Add m-esr52 at 52.6.0

1 files changed, 727 insertions, 0 deletions

diff --git a/dom/html/nsBrowserElement.cpp b/dom/html/nsBrowserElement.cpp
new file mode 100644
index 000000000..858d1c7cb
--- /dev/null
+++ b/dom/html/nsBrowserElement.cpp
@@ -0,0 +1,727 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsBrowserElement.h"
+
+#include "mozilla/Preferences.h"
+#include "mozilla/Services.h"
+#include "mozilla/dom/BrowserElementBinding.h"
+#include "mozilla/dom/BrowserElementAudioChannel.h"
+#include "mozilla/dom/DOMRequest.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/dom/ToJSValue.h"
+
+#include "AudioChannelService.h"
+
+#include "mozIApplication.h"
+#include "nsComponentManagerUtils.h"
+#include "nsFrameLoader.h"
+#include "nsIAppsService.h"
+#include "nsIDOMDOMRequest.h"
+#include "nsIDOMElement.h"
+#include "nsIMozBrowserFrame.h"
+#include "nsINode.h"
+#include "nsIPrincipal.h"
+
+using namespace mozilla::dom;
+
+namespace mozilla {
+
+bool
+nsBrowserElement::IsBrowserElementOrThrow(ErrorResult& aRv)
+{
+  if (mBrowserElementAPI) {
+    return true;
+  }
+  aRv.Throw(NS_ERROR_DOM_INVALID_NODE_TYPE_ERR);
+  return false;
+}
+
+void
+nsBrowserElement::InitBrowserElementAPI()
+{
+  bool isMozBrowserOrApp;
+  nsCOMPtr<nsIFrameLoader> frameLoader = GetFrameLoader();
+  NS_ENSURE_TRUE_VOID(frameLoader);
+  nsresult rv = frameLoader->GetOwnerIsMozBrowserOrAppFrame(&isMozBrowserOrApp);
+  NS_ENSURE_SUCCESS_VOID(rv);
+
+  if (!isMozBrowserOrApp) {
+    return;
+  }
+
+  if (!mBrowserElementAPI) {
+    mBrowserElementAPI = do_CreateInstance("@mozilla.org/dom/browser-element-api;1");
+    if (NS_WARN_IF(!mBrowserElementAPI)) {
+      return;
+    }
+  }
+  mBrowserElementAPI->SetFrameLoader(frameLoader);
+}
+
+void
+nsBrowserElement::DestroyBrowserElementFrameScripts()
+{
+  if (!mBrowserElementAPI) {
+    return;
+  }
+  mBrowserElementAPI->DestroyFrameScripts();
+}
+
+void
+nsBrowserElement::SetVisible(bool aVisible, ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->SetVisible(aVisible);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+already_AddRefed<DOMRequest>
+nsBrowserElement::GetVisible(ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->GetVisible(getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return nullptr;
+  }
+
+  return req.forget().downcast<DOMRequest>();
+}
+
+void
+nsBrowserElement::SetActive(bool aVisible, ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->SetActive(aVisible);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+bool
+nsBrowserElement::GetActive(ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), false);
+
+  bool isActive;
+  nsresult rv = mBrowserElementAPI->GetActive(&isActive);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return false;
+  }
+
+  return isActive;
+}
+
+void
+nsBrowserElement::SendMouseEvent(const nsAString& aType,
+                                 uint32_t aX,
+                                 uint32_t aY,
+                                 uint32_t aButton,
+                                 uint32_t aClickCount,
+                                 uint32_t aModifiers,
+                                 ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->SendMouseEvent(aType,
+                                                   aX,
+                                                   aY,
+                                                   aButton,
+                                                   aClickCount,
+                                                   aModifiers);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+void
+nsBrowserElement::SendTouchEvent(const nsAString& aType,
+                                 const Sequence<uint32_t>& aIdentifiers,
+                                 const Sequence<int32_t>& aXs,
+                                 const Sequence<int32_t>& aYs,
+                                 const Sequence<uint32_t>& aRxs,
+                                 const Sequence<uint32_t>& aRys,
+                                 const Sequence<float>& aRotationAngles,
+                                 const Sequence<float>& aForces,
+                                 uint32_t aCount,
+                                 uint32_t aModifiers,
+                                 ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  if (aIdentifiers.Length() != aCount ||
+      aXs.Length() != aCount ||
+      aYs.Length() != aCount ||
+      aRxs.Length() != aCount ||
+      aRys.Length() != aCount ||
+      aRotationAngles.Length() != aCount ||
+      aForces.Length() != aCount) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
+    return;
+  }
+
+  nsresult rv = mBrowserElementAPI->SendTouchEvent(aType,
+                                                   aIdentifiers.Elements(),
+                                                   aXs.Elements(),
+                                                   aYs.Elements(),
+                                                   aRxs.Elements(),
+                                                   aRys.Elements(),
+                                                   aRotationAngles.Elements(),
+                                                   aForces.Elements(),
+                                                   aCount,
+                                                   aModifiers);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+void
+nsBrowserElement::GoBack(ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->GoBack();
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+void
+nsBrowserElement::GoForward(ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->GoForward();
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+void
+nsBrowserElement::Reload(bool aHardReload, ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->Reload(aHardReload);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+void
+nsBrowserElement::Stop(ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->Stop();
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+already_AddRefed<DOMRequest>
+nsBrowserElement::Download(const nsAString& aUrl,
+                           const BrowserElementDownloadOptions& aOptions,
+                           ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsCOMPtr<nsIXPConnectWrappedJS> wrappedObj = do_QueryInterface(mBrowserElementAPI);
+  MOZ_ASSERT(wrappedObj, "Failed to get wrapped JS from XPCOM component.");
+  AutoJSAPI jsapi;
+  if (!jsapi.Init(wrappedObj->GetJSObject())) {
+    aRv.Throw(NS_ERROR_UNEXPECTED);
+    return nullptr;
+  }
+  JSContext* cx = jsapi.cx();
+  JS::Rooted<JS::Value> options(cx);
+  aRv.MightThrowJSException();
+  if (!ToJSValue(cx, aOptions, &options)) {
+    aRv.StealExceptionFromJSContext(cx);
+    return nullptr;
+  }
+  nsresult rv = mBrowserElementAPI->Download(aUrl, options, getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return nullptr;
+  }
+
+  return req.forget().downcast<DOMRequest>();
+}
+
+already_AddRefed<DOMRequest>
+nsBrowserElement::PurgeHistory(ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->PurgeHistory(getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return nullptr;
+  }
+
+  return req.forget().downcast<DOMRequest>();
+}
+
+already_AddRefed<DOMRequest>
+nsBrowserElement::GetScreenshot(uint32_t aWidth,
+                                uint32_t aHeight,
+                                const nsAString& aMimeType,
+                                ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->GetScreenshot(aWidth, aHeight, aMimeType,
+                                                  getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    if (rv == NS_ERROR_INVALID_ARG) {
+      aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
+    } else {
+      aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    }
+    return nullptr;
+  }
+
+  return req.forget().downcast<DOMRequest>();
+}
+
+void
+nsBrowserElement::Zoom(float aZoom, ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->Zoom(aZoom);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+already_AddRefed<DOMRequest>
+nsBrowserElement::GetCanGoBack(ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->GetCanGoBack(getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return nullptr;
+  }
+
+  return req.forget().downcast<DOMRequest>();
+}
+
+already_AddRefed<DOMRequest>
+nsBrowserElement::GetCanGoForward(ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->GetCanGoForward(getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return nullptr;
+  }
+
+  return req.forget().downcast<DOMRequest>();
+}
+
+already_AddRefed<DOMRequest>
+nsBrowserElement::GetContentDimensions(ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->GetContentDimensions(getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return nullptr;
+  }
+
+  return req.forget().downcast<DOMRequest>();
+}
+
+void
+nsBrowserElement::FindAll(const nsAString& aSearchString,
+                          BrowserFindCaseSensitivity aCaseSensitivity,
+                          ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  uint32_t caseSensitivity;
+  if (aCaseSensitivity == BrowserFindCaseSensitivity::Case_insensitive) {
+    caseSensitivity = nsIBrowserElementAPI::FIND_CASE_INSENSITIVE;
+  } else {
+    caseSensitivity = nsIBrowserElementAPI::FIND_CASE_SENSITIVE;
+  }
+
+  nsresult rv = mBrowserElementAPI->FindAll(aSearchString, caseSensitivity);
+
+  if (NS_FAILED(rv)) {
+    aRv.Throw(rv);
+  }
+}
+
+void
+nsBrowserElement::FindNext(BrowserFindDirection aDirection,
+                          ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  uint32_t direction;
+  if (aDirection == BrowserFindDirection::Backward) {
+    direction = nsIBrowserElementAPI::FIND_BACKWARD;
+  } else {
+    direction = nsIBrowserElementAPI::FIND_FORWARD;
+  }
+
+  nsresult rv = mBrowserElementAPI->FindNext(direction);
+
+  if (NS_FAILED(rv)) {
+    aRv.Throw(rv);
+  }
+}
+
+void
+nsBrowserElement::ClearMatch(ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->ClearMatch();
+
+  if (NS_FAILED(rv)) {
+    aRv.Throw(rv);
+  }
+}
+
+void
+nsBrowserElement::AddNextPaintListener(BrowserElementNextPaintEventCallback& aListener,
+                                       ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  CallbackObjectHolder<BrowserElementNextPaintEventCallback,
+                       nsIBrowserElementNextPaintListener> holder(&aListener);
+  nsCOMPtr<nsIBrowserElementNextPaintListener> listener = holder.ToXPCOMCallback();
+
+  nsresult rv = mBrowserElementAPI->AddNextPaintListener(listener);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+void
+nsBrowserElement::RemoveNextPaintListener(BrowserElementNextPaintEventCallback& aListener,
+                                          ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  CallbackObjectHolder<BrowserElementNextPaintEventCallback,
+                       nsIBrowserElementNextPaintListener> holder(&aListener);
+  nsCOMPtr<nsIBrowserElementNextPaintListener> listener = holder.ToXPCOMCallback();
+
+  nsresult rv = mBrowserElementAPI->RemoveNextPaintListener(listener);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+already_AddRefed<DOMRequest>
+nsBrowserElement::SetInputMethodActive(bool aIsActive,
+                                       ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->SetInputMethodActive(aIsActive,
+                                                         getter_AddRefs(req));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    if (rv == NS_ERROR_INVALID_ARG) {
+      aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
+    } else {
+      aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    }
+    return nullptr;
+  }
+
+  return req.forget().downcast<DOMRequest>();
+}
+
+void
+nsBrowserElement::GetAllowedAudioChannels(
+                 nsTArray<RefPtr<BrowserElementAudioChannel>>& aAudioChannels,
+                 ErrorResult& aRv)
+{
+  aAudioChannels.Clear();
+
+  // If empty, it means that this is the first call of this method.
+  if (mBrowserElementAudioChannels.IsEmpty()) {
+    nsCOMPtr<nsIFrameLoader> frameLoader = GetFrameLoader();
+    if (NS_WARN_IF(!frameLoader)) {
+      return;
+    }
+
+    bool isMozBrowserOrApp;
+    aRv = frameLoader->GetOwnerIsMozBrowserOrAppFrame(&isMozBrowserOrApp);
+    if (NS_WARN_IF(aRv.Failed())) {
+      return;
+    }
+
+    if (!isMozBrowserOrApp) {
+      return;
+    }
+
+    nsCOMPtr<nsIDOMElement> frameElement;
+    aRv = frameLoader->GetOwnerElement(getter_AddRefs(frameElement));
+    if (NS_WARN_IF(aRv.Failed())) {
+      return;
+    }
+
+    MOZ_ASSERT(frameElement);
+
+    nsCOMPtr<nsIDOMDocument> doc;
+    aRv = frameElement->GetOwnerDocument(getter_AddRefs(doc));
+    if (NS_WARN_IF(aRv.Failed())) {
+      return;
+    }
+
+    MOZ_ASSERT(doc);
+
+    nsCOMPtr<mozIDOMWindowProxy> win;
+    aRv = doc->GetDefaultView(getter_AddRefs(win));
+    if (NS_WARN_IF(aRv.Failed())) {
+      return;
+    }
+
+    MOZ_ASSERT(win);
+
+    auto* window = nsPIDOMWindowOuter::From(win);
+    nsPIDOMWindowInner* innerWindow = window->GetCurrentInnerWindow();
+
+    nsCOMPtr<nsIMozBrowserFrame> mozBrowserFrame =
+      do_QueryInterface(frameElement);
+    if (NS_WARN_IF(!mozBrowserFrame)) {
+      aRv.Throw(NS_ERROR_FAILURE);
+      return;
+    }
+
+    MOZ_LOG(AudioChannelService::GetAudioChannelLog(), LogLevel::Debug,
+            ("nsBrowserElement, GetAllowedAudioChannels, this = %p\n", this));
+
+    GenerateAllowedAudioChannels(innerWindow, frameLoader, mBrowserElementAPI,
+                                 mBrowserElementAudioChannels, aRv);
+    if (NS_WARN_IF(aRv.Failed())) {
+      return;
+    }
+  }
+
+  aAudioChannels.AppendElements(mBrowserElementAudioChannels);
+}
+
+/* static */ void
+nsBrowserElement::GenerateAllowedAudioChannels(
+                 nsPIDOMWindowInner* aWindow,
+                 nsIFrameLoader* aFrameLoader,
+                 nsIBrowserElementAPI* aAPI,
+                 nsTArray<RefPtr<BrowserElementAudioChannel>>& aAudioChannels,
+                 ErrorResult& aRv)
+{
+  MOZ_ASSERT(aAudioChannels.IsEmpty());
+
+  // Normal is always allowed.
+  nsTArray<RefPtr<BrowserElementAudioChannel>> channels;
+
+  RefPtr<BrowserElementAudioChannel> ac =
+    BrowserElementAudioChannel::Create(aWindow, aFrameLoader, aAPI,
+                                       AudioChannel::Normal, aRv);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return;
+  }
+
+  channels.AppendElement(ac);
+
+  nsCOMPtr<nsIDocument> doc = aWindow->GetExtantDoc();
+  if (NS_WARN_IF(!doc)) {
+    aRv.Throw(NS_ERROR_FAILURE);
+    return;
+  }
+
+  // Since we don't have permissions anymore let only chrome windows pick a
+  // non-default channel
+  if (nsContentUtils::IsChromeDoc(doc)) {
+    const nsAttrValue::EnumTable* audioChannelTable =
+      AudioChannelService::GetAudioChannelTable();
+
+    for (uint32_t i = 0; audioChannelTable && audioChannelTable[i].tag; ++i) {
+      AudioChannel value = (AudioChannel)audioChannelTable[i].value;
+      RefPtr<BrowserElementAudioChannel> ac =
+        BrowserElementAudioChannel::Create(aWindow, aFrameLoader, aAPI,
+                                           value, aRv);
+      if (NS_WARN_IF(aRv.Failed())) {
+        return;
+      }
+
+      channels.AppendElement(ac);
+    }
+  }
+
+  aAudioChannels.SwapElements(channels);
+}
+
+already_AddRefed<DOMRequest>
+nsBrowserElement::GetMuted(ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->GetMuted(getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return nullptr;
+  }
+
+  return req.forget().downcast<DOMRequest>();
+}
+
+void
+nsBrowserElement::Mute(ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->Mute();
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+void
+nsBrowserElement::Unmute(ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->Unmute();
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+already_AddRefed<DOMRequest>
+nsBrowserElement::GetVolume(ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->GetVolume(getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return nullptr;
+  }
+
+  return req.forget().downcast<DOMRequest>();
+}
+
+void
+nsBrowserElement::SetVolume(float aVolume, ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE_VOID(IsBrowserElementOrThrow(aRv));
+
+  nsresult rv = mBrowserElementAPI->SetVolume(aVolume);
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+  }
+}
+
+already_AddRefed<DOMRequest>
+nsBrowserElement::ExecuteScript(const nsAString& aScript,
+                                const BrowserElementExecuteScriptOptions& aOptions,
+                                ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsCOMPtr<nsIXPConnectWrappedJS> wrappedObj = do_QueryInterface(mBrowserElementAPI);
+  MOZ_ASSERT(wrappedObj, "Failed to get wrapped JS from XPCOM component.");
+  AutoJSAPI jsapi;
+  if (!jsapi.Init(wrappedObj->GetJSObject())) {
+    aRv.Throw(NS_ERROR_UNEXPECTED);
+    return nullptr;
+  }
+  JSContext* cx = jsapi.cx();
+  JS::Rooted<JS::Value> options(cx);
+  aRv.MightThrowJSException();
+  if (!ToJSValue(cx, aOptions, &options)) {
+    aRv.StealExceptionFromJSContext(cx);
+    return nullptr;
+  }
+
+  nsresult rv = mBrowserElementAPI->ExecuteScript(aScript, options, getter_AddRefs(req));
+
+  if (NS_FAILED(rv)) {
+    if (rv == NS_ERROR_INVALID_ARG) {
+      aRv.Throw(NS_ERROR_DOM_INVALID_ACCESS_ERR);
+    } else {
+      aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    }
+    return nullptr;
+  }
+
+  return req.forget().downcast<DOMRequest>();
+}
+
+already_AddRefed<DOMRequest>
+nsBrowserElement::GetWebManifest(ErrorResult& aRv)
+{
+  NS_ENSURE_TRUE(IsBrowserElementOrThrow(aRv), nullptr);
+
+  nsCOMPtr<nsIDOMDOMRequest> req;
+  nsresult rv = mBrowserElementAPI->GetWebManifest(getter_AddRefs(req));
+
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return nullptr;
+  }
+
+  return req.forget().downcast<DOMRequest>();
+}
+
+
+
+} // namespace mozilla