Merge branch 'redwood' into releaseRELBASE_20200929RC_20200924

14 files changed, 32 insertions, 190 deletions

diff --git a/widget/cocoa/nsDragService.mm b/widget/cocoa/nsDragService.mm
index b92db1b2a..c4d8e6ff0 100644
--- a/widget/cocoa/nsDragService.mm
+++ b/widget/cocoa/nsDragService.mm
@@ -222,7 +222,7 @@ nsDragService::ConstructDragImage(nsIDOMNode* aDOMNode,
 bool
 nsDragService::IsValidType(NSString* availableType, bool allowFileURL)
 {
-  NS_OBJC_BEGIN_TRY_ABORT_BLOCK;
+  NS_OBJC_BEGIN_TRY_ABORT_BLOCK_RETURN;
 
   // Prevent exposing fileURL for non-fileURL type.
   // We need URL provided by dropped webloc file, but don't need file's URL.
@@ -234,7 +234,7 @@ nsDragService::IsValidType(NSString* availableType, bool allowFileURL)
 
   return true;
 
-  NS_OBJC_END_TRY_ABORT_BLOCK(false);
+  NS_OBJC_END_TRY_ABORT_BLOCK_RETURN(false);
 }
 
 NSString*
diff --git a/widget/windows/AudioSession.cpp b/widget/windows/AudioSession.cpp
index 11e5ba50c..1a83e2964 100644
--- a/widget/windows/AudioSession.cpp
+++ b/widget/windows/AudioSession.cpp
@@ -13,7 +13,7 @@
 #include "nsIUUIDGenerator.h"
 #include "nsIXULAppInfo.h"
 
-//#include "AudioSession.h"
+#include "AudioSession.h"
 #include "nsCOMPtr.h"
 #include "nsServiceManagerUtils.h"
 #include "nsString.h"
@@ -27,7 +27,7 @@ namespace mozilla {
 namespace widget {
 
 /*
- * To take advantage of what Vista+ have to offer with respect to audio,
+ * To take advantage of what Windows has to offer with respect to audio,
  * we need to maintain an audio session.  This class wraps IAudioSessionControl
  * and implements IAudioSessionEvents (for callbacks from Windows)
  */
diff --git a/widget/windows/CompositorWidgetParent.cpp b/widget/windows/CompositorWidgetParent.cpp
index c784ff72e..238141f56 100644
--- a/widget/windows/CompositorWidgetParent.cpp
+++ b/widget/windows/CompositorWidgetParent.cpp
@@ -4,6 +4,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 #include "CompositorWidgetParent.h"
+#include "VsyncDispatcher.h"
 
 #include "mozilla/Unused.h"
 
diff --git a/widget/windows/IMMHandler.cpp b/widget/windows/IMMHandler.cpp
index 9bd7d2e7a..e16517a38 100644
--- a/widget/windows/IMMHandler.cpp
+++ b/widget/windows/IMMHandler.cpp
@@ -17,6 +17,8 @@
 #include "mozilla/MiscEvents.h"
 #include "mozilla/TextEvents.h"
 
+using namespace mozilla;
+
 #ifndef IME_PROP_ACCEPT_WIDE_VKEY
 #define IME_PROP_ACCEPT_WIDE_VKEY 0x20
 #endif
diff --git a/widget/windows/InkCollector.cpp b/widget/windows/InkCollector.cpp
index 5383dda7c..3268fe95b 100644
--- a/widget/windows/InkCollector.cpp
+++ b/widget/windows/InkCollector.cpp
@@ -7,6 +7,8 @@
 
 #include "InkCollector.h"
 
+using namespace mozilla;
+
 // Msinkaut_i.c and Msinkaut.h should both be included
 // https://msdn.microsoft.com/en-us/library/windows/desktop/ms695519.aspx
 #include <msinkaut_i.c>
diff --git a/widget/windows/KeyboardLayout.cpp b/widget/windows/KeyboardLayout.cpp
index 9166d97d7..b4801fa19 100644
--- a/widget/windows/KeyboardLayout.cpp
+++ b/widget/windows/KeyboardLayout.cpp
@@ -39,11 +39,6 @@
 #include <winable.h>
 #endif
 
-// In WinUser.h, MAPVK_VK_TO_VSC_EX is defined only when WINVER >= 0x0600
-#ifndef MAPVK_VK_TO_VSC_EX
-#define MAPVK_VK_TO_VSC_EX (4)
-#endif
-
 namespace mozilla {
 namespace widget {
 
diff --git a/widget/windows/TaskbarPreview.cpp b/widget/windows/TaskbarPreview.cpp
index 6c15df2e0..b07b8039f 100644
--- a/widget/windows/TaskbarPreview.cpp
+++ b/widget/windows/TaskbarPreview.cpp
@@ -139,7 +139,7 @@ TaskbarPreview::Invalidate() {
     return NS_OK;
 
   HWND previewWindow = PreviewWindow();
-  return FAILED(WinUtils::dwmInvalidateIconicBitmapsPtr(previewWindow))
+  return FAILED(DwmInvalidateIconicBitmaps(previewWindow))
        ? NS_ERROR_FAILURE
        : NS_OK;
 }
@@ -284,13 +284,13 @@ TaskbarPreview::GetWindowHook() {
 void
 TaskbarPreview::EnableCustomDrawing(HWND aHWND, bool aEnable) {
   BOOL enabled = aEnable;
-  WinUtils::dwmSetWindowAttributePtr(
+  DwmSetWindowAttribute(
       aHWND,
       DWMWA_FORCE_ICONIC_REPRESENTATION,
       &enabled,
       sizeof(enabled));
 
-  WinUtils::dwmSetWindowAttributePtr(
+  DwmSetWindowAttribute(
       aHWND,
       DWMWA_HAS_ICONIC_BITMAP,
       &enabled,
@@ -385,11 +385,11 @@ TaskbarPreviewCallback::Done(nsISupports *aCanvas, bool aDrawBorder) {
   POINT pptClient = { 0, 0 };
   HRESULT hr;
   if (!mIsThumbnail) {
-    hr = WinUtils::dwmSetIconicLivePreviewBitmapPtr(mPreview->PreviewWindow(),
-                                                    hBitmap, &pptClient, flags);
+    hr = DwmSetIconicLivePreviewBitmap(mPreview->PreviewWindow(),
+                                       hBitmap, &pptClient, flags);
   } else {
-    hr = WinUtils::dwmSetIconicThumbnailPtr(mPreview->PreviewWindow(),
-                                            hBitmap, flags);
+    hr = DwmSetIconicThumbnail(mPreview->PreviewWindow(),
+                               hBitmap, flags);
   }
   MOZ_ASSERT(SUCCEEDED(hr));
   return NS_OK;
diff --git a/widget/windows/WinIMEHandler.cpp b/widget/windows/WinIMEHandler.cpp
index 9debaa2dd..f411cdd50 100644
--- a/widget/windows/WinIMEHandler.cpp
+++ b/widget/windows/WinIMEHandler.cpp
@@ -961,8 +961,8 @@ IMEHandler::ShowOnScreenKeyboard()
       } else {
         PWSTR path = nullptr;
         HRESULT hres =
-          WinUtils::SHGetKnownFolderPath(FOLDERID_ProgramFilesCommon, 0,
-                                         nullptr, &path);
+          SHGetKnownFolderPath(FOLDERID_ProgramFilesCommon, 0,
+                               nullptr, &path);
         if (FAILED(hres) || !path) {
           return;
         }
diff --git a/widget/windows/WinUtils.cpp b/widget/windows/WinUtils.cpp
index bd42e78f6..28033193f 100644
--- a/widget/windows/WinUtils.cpp
+++ b/widget/windows/WinUtils.cpp
@@ -419,26 +419,10 @@ const char FaviconHelper::kShortcutCacheDir[] = "shortcutCache";
 
 // apis available on vista and up.
 WinUtils::SHCreateItemFromParsingNamePtr WinUtils::sCreateItemFromParsingName = nullptr;
-WinUtils::SHGetKnownFolderPathPtr WinUtils::sGetKnownFolderPath = nullptr;
-
 // We just leak these DLL HMODULEs. There's no point in calling FreeLibrary
 // on them during shutdown anyway.
 static const wchar_t kShellLibraryName[] =  L"shell32.dll";
 static HMODULE sShellDll = nullptr;
-static const wchar_t kDwmLibraryName[] = L"dwmapi.dll";
-static HMODULE sDwmDll = nullptr;
-
-WinUtils::DwmExtendFrameIntoClientAreaProc WinUtils::dwmExtendFrameIntoClientAreaPtr = nullptr;
-WinUtils::DwmIsCompositionEnabledProc WinUtils::dwmIsCompositionEnabledPtr = nullptr;
-WinUtils::DwmSetIconicThumbnailProc WinUtils::dwmSetIconicThumbnailPtr = nullptr;
-WinUtils::DwmSetIconicLivePreviewBitmapProc WinUtils::dwmSetIconicLivePreviewBitmapPtr = nullptr;
-WinUtils::DwmGetWindowAttributeProc WinUtils::dwmGetWindowAttributePtr = nullptr;
-WinUtils::DwmSetWindowAttributeProc WinUtils::dwmSetWindowAttributePtr = nullptr;
-WinUtils::DwmInvalidateIconicBitmapsProc WinUtils::dwmInvalidateIconicBitmapsPtr = nullptr;
-WinUtils::DwmDefWindowProcProc WinUtils::dwmDwmDefWindowProcPtr = nullptr;
-WinUtils::DwmGetCompositionTimingInfoProc WinUtils::dwmGetCompositionTimingInfoPtr = nullptr;
-WinUtils::DwmFlushProc WinUtils::dwmFlushProcPtr = nullptr;
-
 // Prefix for path used by NT calls.
 const wchar_t kNTPrefix[] = L"\\??\\";
 const size_t kNTPrefixLen = ArrayLength(kNTPrefix) - 1;
@@ -462,23 +446,6 @@ static NtTestAlertPtr sNtTestAlert = nullptr;
 void
 WinUtils::Initialize()
 {
-  if (!sDwmDll) {
-    sDwmDll = ::LoadLibraryW(kDwmLibraryName);
-
-    if (sDwmDll) {
-      dwmExtendFrameIntoClientAreaPtr = (DwmExtendFrameIntoClientAreaProc)::GetProcAddress(sDwmDll, "DwmExtendFrameIntoClientArea");
-      dwmIsCompositionEnabledPtr = (DwmIsCompositionEnabledProc)::GetProcAddress(sDwmDll, "DwmIsCompositionEnabled");
-      dwmSetIconicThumbnailPtr = (DwmSetIconicThumbnailProc)::GetProcAddress(sDwmDll, "DwmSetIconicThumbnail");
-      dwmSetIconicLivePreviewBitmapPtr = (DwmSetIconicLivePreviewBitmapProc)::GetProcAddress(sDwmDll, "DwmSetIconicLivePreviewBitmap");
-      dwmGetWindowAttributePtr = (DwmGetWindowAttributeProc)::GetProcAddress(sDwmDll, "DwmGetWindowAttribute");
-      dwmSetWindowAttributePtr = (DwmSetWindowAttributeProc)::GetProcAddress(sDwmDll, "DwmSetWindowAttribute");
-      dwmInvalidateIconicBitmapsPtr = (DwmInvalidateIconicBitmapsProc)::GetProcAddress(sDwmDll, "DwmInvalidateIconicBitmaps");
-      dwmDwmDefWindowProcPtr = (DwmDefWindowProcProc)::GetProcAddress(sDwmDll, "DwmDefWindowProc");
-      dwmGetCompositionTimingInfoPtr = (DwmGetCompositionTimingInfoProc)::GetProcAddress(sDwmDll, "DwmGetCompositionTimingInfo");
-      dwmFlushProcPtr = (DwmFlushProc)::GetProcAddress(sDwmDll, "DwmFlush");
-    }
-  }
-
   if (IsWin10OrLater()) {
     HMODULE user32Dll = ::GetModuleHandleW(L"user32");
     if (user32Dll) {
@@ -1179,32 +1146,6 @@ WinUtils::SHCreateItemFromParsingName(PCWSTR pszPath, IBindCtx *pbc,
   return sCreateItemFromParsingName(pszPath, pbc, riid, ppv);
 }
 
-/* static */
-HRESULT 
-WinUtils::SHGetKnownFolderPath(REFKNOWNFOLDERID rfid,
-                               DWORD dwFlags,
-                               HANDLE hToken,
-                               PWSTR *ppszPath)
-{
-  if (sGetKnownFolderPath) {
-    return sGetKnownFolderPath(rfid, dwFlags, hToken, ppszPath);
-  }
-
-  if (!sShellDll) {
-    sShellDll = ::LoadLibraryW(kShellLibraryName);
-    if (!sShellDll) {
-      return false;
-    }
-  }
-
-  sGetKnownFolderPath = (SHGetKnownFolderPathPtr)
-    GetProcAddress(sShellDll, "SHGetKnownFolderPath");
-  if (!sGetKnownFolderPath)
-    return E_FAIL;
-
-  return sGetKnownFolderPath(rfid, dwFlags, hToken, ppszPath);
-}
-
 static BOOL
 WINAPI EnumFirstChild(HWND hwnd, LPARAM lParam)
 {
diff --git a/widget/windows/WinUtils.h b/widget/windows/WinUtils.h
index 37469ce07..1281171be 100644
--- a/widget/windows/WinUtils.h
+++ b/widget/windows/WinUtils.h
@@ -399,14 +399,6 @@ public:
                                              REFIID riid, void **ppv);
 
   /**
-   * SHGetKnownFolderPath() calls native SHGetKnownFolderPath()
-   * API which is available on Vista and up.
-   */
-  static HRESULT SHGetKnownFolderPath(REFKNOWNFOLDERID rfid,
-                                      DWORD dwFlags,
-                                      HANDLE hToken,
-                                      PWSTR *ppszPath);
-  /**
    * GetShellItemPath return the file or directory path of a shell item.
    * Internally calls IShellItem's GetDisplayName.
    *
@@ -478,31 +470,6 @@ public:
    */
   static bool ResolveJunctionPointsAndSymLinks(std::wstring& aPath);
 
-  /**
-  * dwmapi.dll function typedefs and declarations
-  */
-  typedef HRESULT (WINAPI*DwmExtendFrameIntoClientAreaProc)(HWND hWnd, const MARGINS *pMarInset);
-  typedef HRESULT (WINAPI*DwmIsCompositionEnabledProc)(BOOL *pfEnabled);
-  typedef HRESULT (WINAPI*DwmSetIconicThumbnailProc)(HWND hWnd, HBITMAP hBitmap, DWORD dwSITFlags);
-  typedef HRESULT (WINAPI*DwmSetIconicLivePreviewBitmapProc)(HWND hWnd, HBITMAP hBitmap, POINT *pptClient, DWORD dwSITFlags);
-  typedef HRESULT (WINAPI*DwmGetWindowAttributeProc)(HWND hWnd, DWORD dwAttribute, LPCVOID pvAttribute, DWORD cbAttribute);
-  typedef HRESULT (WINAPI*DwmSetWindowAttributeProc)(HWND hWnd, DWORD dwAttribute, LPCVOID pvAttribute, DWORD cbAttribute);
-  typedef HRESULT (WINAPI*DwmInvalidateIconicBitmapsProc)(HWND hWnd);
-  typedef HRESULT (WINAPI*DwmDefWindowProcProc)(HWND hWnd, UINT msg, LPARAM lParam, WPARAM wParam, LRESULT *aRetValue);
-  typedef HRESULT (WINAPI*DwmGetCompositionTimingInfoProc)(HWND hWnd, DWM_TIMING_INFO *info);
-  typedef HRESULT (WINAPI*DwmFlushProc)(void);
-
-  static DwmExtendFrameIntoClientAreaProc dwmExtendFrameIntoClientAreaPtr;
-  static DwmIsCompositionEnabledProc dwmIsCompositionEnabledPtr;
-  static DwmSetIconicThumbnailProc dwmSetIconicThumbnailPtr;
-  static DwmSetIconicLivePreviewBitmapProc dwmSetIconicLivePreviewBitmapPtr;
-  static DwmGetWindowAttributeProc dwmGetWindowAttributePtr;
-  static DwmSetWindowAttributeProc dwmSetWindowAttributePtr;
-  static DwmInvalidateIconicBitmapsProc dwmInvalidateIconicBitmapsPtr;
-  static DwmDefWindowProcProc dwmDwmDefWindowProcPtr;
-  static DwmGetCompositionTimingInfoProc dwmGetCompositionTimingInfoPtr;
-  static DwmFlushProc dwmFlushProcPtr;
-
   static void Initialize();
 
   static bool ShouldHideScrollbars();
@@ -529,12 +496,6 @@ private:
                                                             REFIID riid,
                                                             void **ppv);
   static SHCreateItemFromParsingNamePtr sCreateItemFromParsingName;
-  typedef HRESULT (WINAPI * SHGetKnownFolderPathPtr)(REFKNOWNFOLDERID rfid,
-                                                     DWORD dwFlags,
-                                                     HANDLE hToken,
-                                                     PWSTR *ppszPath);
-  static SHGetKnownFolderPathPtr sGetKnownFolderPath;
-
   static void GetWhitelistedPaths(
       nsTArray<mozilla::Pair<nsString,nsDependentString>>& aOutput);
 };
diff --git a/widget/windows/nsAppShell.cpp b/widget/windows/nsAppShell.cpp
index c3e99b2d3..e63d57d89 100644
--- a/widget/windows/nsAppShell.cpp
+++ b/widget/windows/nsAppShell.cpp
@@ -53,9 +53,9 @@ public:
 
   NS_IMETHOD Notify(nsITimer *timer) override {
     WAKE_LOCK_LOG("WinWakeLock: periodic timer fired");
-    ResetScreenSaverTimeout();
     return NS_OK;
   }
+
 private:
   ~WinWakeLockListener() {}
 
@@ -67,75 +67,15 @@ private:
     // "locked-foreground" notifications when multipe wake locks are held.
     if (aState.EqualsASCII("locked-foreground")) {
       WAKE_LOCK_LOG("WinWakeLock: Blocking screen saver");
-      // We block the screen saver by periodically resetting the screen
-      // saver timeout.
-      StartTimer();
-      // Prevent the display turning off. On Win7 and later this also
-      // blocks the screen saver, but we need the timer started above
-      // to block on Win XP and Vista.
+      // Prevent the display turning off.
       SetThreadExecutionState(ES_DISPLAY_REQUIRED|ES_CONTINUOUS);
     } else {
       WAKE_LOCK_LOG("WinWakeLock: Unblocking screen saver");
-      // Re-enable screen saver.
-      StopTimer();
       // Unblock display turning off.
       SetThreadExecutionState(ES_CONTINUOUS);
     }
     return NS_OK;
   }
-
-  void StartTimer() {
-    ResetScreenSaverTimeout();
-    MOZ_ASSERT(!mTimer);
-    if (mTimer) {
-      return;
-    }
-
-    nsresult rv;
-    nsCOMPtr<nsITimer> timer = do_CreateInstance(NS_TIMER_CONTRACTID, &rv);
-    if (NS_FAILED(rv)) {
-      NS_WARNING("Failed to create screen saver timeout reset timer");
-      return;
-    }
-    // The minimum screensaver timeout that can be specified with Windows' UI
-    // is 60 seconds. We set a timer to re-jig the screen saver 10 seconds
-    // before we expect the timer to run out, but always at least in 1 second
-    // intervals. We reset the timer at a max of 50 seconds, so that if the
-    // user changes the timeout using the UI, we won't be caught out.
-    int32_t timeout = std::max(std::min(50, (int32_t)mScreenSaverTimeout - 10), 1);
-    uint32_t timeoutMs = (uint32_t)timeout * 1000;
-    WAKE_LOCK_LOG("WinWakeLock: Setting periodic timer for %d ms", timeoutMs);
-    rv = timer->InitWithCallback(this,
-                                 timeoutMs,
-                                 nsITimer::TYPE_REPEATING_SLACK);
-    if (NS_FAILED(rv)) {
-      NS_WARNING("Failed to initialize screen saver timeout reset timer");
-      return;
-    }
-
-    mTimer = timer.forget();
-  }
-
-  void StopTimer() {
-    WAKE_LOCK_LOG("WinWakeLock: StopTimer()");
-    if (!mTimer) {
-      return;
-    }
-    mTimer->Cancel();
-    mTimer = nullptr;
-  }
-
-  // Resets the operating system's timeout for when to disable the screen.
-  // Called periodically to keep the screensaver off.
-  void ResetScreenSaverTimeout() {
-    if (SystemParametersInfo(SPI_GETSCREENSAVETIMEOUT, 0, &mScreenSaverTimeout, 0)) {
-      SystemParametersInfo(SPI_SETSCREENSAVETIMEOUT, mScreenSaverTimeout, NULL, 0);
-    }
-    WAKE_LOCK_LOG("WinWakeLock: ResetScreenSaverTimeout() mScreenSaverTimeout=%d", mScreenSaverTimeout);
-  }
-
-  UINT mScreenSaverTimeout = 60;
-  nsCOMPtr<nsITimer> mTimer;
 };
 
 NS_IMPL_ISUPPORTS(WinWakeLockListener, nsIDOMMozWakeLockListener, nsITimerCallback)
diff --git a/widget/windows/nsFilePicker.cpp b/widget/windows/nsFilePicker.cpp
index 4e942968a..53824b93f 100644
--- a/widget/windows/nsFilePicker.cpp
+++ b/widget/windows/nsFilePicker.cpp
@@ -220,7 +220,7 @@ STDMETHODIMP nsFilePicker::QueryInterface(REFIID refiid, void** ppvResult)
 
 
 /*
- * Vista+ callbacks
+ * Callbacks
  */
 
 HRESULT
diff --git a/widget/windows/nsUXThemeData.cpp b/widget/windows/nsUXThemeData.cpp
index 4d9ac9570..ce2777585 100644
--- a/widget/windows/nsUXThemeData.cpp
+++ b/widget/windows/nsUXThemeData.cpp
@@ -156,10 +156,10 @@ nsUXThemeData::UpdateTitlebarInfo(HWND aWnd)
 
   if (!sTitlebarInfoPopulatedAero && nsUXThemeData::CheckForCompositor()) {
     RECT captionButtons;
-    if (SUCCEEDED(WinUtils::dwmGetWindowAttributePtr(aWnd,
-                                                     DWMWA_CAPTION_BUTTON_BOUNDS,
-                                                     &captionButtons,
-                                                     sizeof(captionButtons)))) {
+    if (SUCCEEDED(DwmGetWindowAttribute(aWnd,
+                                        DWMWA_CAPTION_BUTTON_BOUNDS,
+                                        &captionButtons,
+                                        sizeof(captionButtons)))) {
       sCommandButtons[CMDBUTTONIDX_BUTTONBOX].cx = captionButtons.right - captionButtons.left - 3;
       sCommandButtons[CMDBUTTONIDX_BUTTONBOX].cy = (captionButtons.bottom - captionButtons.top) - 1;
       sTitlebarInfoPopulatedAero = true;
@@ -293,8 +293,8 @@ bool nsUXThemeData::IsHighContrastOn()
 bool nsUXThemeData::CheckForCompositor(bool aUpdateCache)
 {
   static BOOL sCachedValue = FALSE;
-  if (aUpdateCache && WinUtils::dwmIsCompositionEnabledPtr) {
-    WinUtils::dwmIsCompositionEnabledPtr(&sCachedValue);
+  if (aUpdateCache) {
+    DwmIsCompositionEnabled(&sCachedValue);
   }
   return sCachedValue;
 }
diff --git a/widget/windows/nsWindow.cpp b/widget/windows/nsWindow.cpp
index 122d18686..907d8b9a5 100644
--- a/widget/windows/nsWindow.cpp
+++ b/widget/windows/nsWindow.cpp
@@ -846,9 +846,9 @@ nsWindow::Create(nsIWidget* aParent,
     return NS_ERROR_FAILURE;
   }
 
-  if (mIsRTL && WinUtils::dwmSetWindowAttributePtr) {
+  if (mIsRTL) {
     DWORD dwAttribute = TRUE;    
-    WinUtils::dwmSetWindowAttributePtr(mWnd, DWMWA_NONCLIENT_RTL_LAYOUT, &dwAttribute, sizeof dwAttribute);
+    DwmSetWindowAttribute(mWnd, DWMWA_NONCLIENT_RTL_LAYOUT, &dwAttribute, sizeof dwAttribute);
   }
 
   if (!IsPlugin() &&
@@ -3113,8 +3113,8 @@ void nsWindow::UpdateGlass()
 
   // Extends the window frame behind the client area
   if (nsUXThemeData::CheckForCompositor()) {
-    WinUtils::dwmExtendFrameIntoClientAreaPtr(mWnd, &margins);
-    WinUtils::dwmSetWindowAttributePtr(mWnd, DWMWA_NCRENDERING_POLICY, &policy, sizeof policy);
+    DwmExtendFrameIntoClientArea(mWnd, &margins);
+    DwmSetWindowAttribute(mWnd, DWMWA_NCRENDERING_POLICY, &policy, sizeof policy);
   }
 }
 #endif
@@ -4961,7 +4961,7 @@ nsWindow::ProcessMessage(UINT msg, WPARAM& wParam, LPARAM& lParam,
       /* We don't do this for win10 glass with a custom titlebar,
        * in order to avoid the caption buttons breaking. */
       !(IsWin10OrLater() && HasGlass()) &&
-      WinUtils::dwmDwmDefWindowProcPtr(mWnd, msg, wParam, lParam, &dwmHitResult)) {
+      DwmDefWindowProc(mWnd, msg, wParam, lParam, &dwmHitResult)) {
     *aRetValue = dwmHitResult;
     return true;
   }