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diff --git a/dom/speakermanager/SpeakerManager.h b/dom/speakermanager/SpeakerManager.h
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+++ b/dom/speakermanager/SpeakerManager.h
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+/* -*- 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/. */
+
+#ifndef mozilla_dom_SpeakerManager_h
+#define mozilla_dom_SpeakerManager_h
+
+#include "mozilla/DOMEventTargetHelper.h"
+#include "mozilla/dom/MozSpeakerManagerBinding.h"
+
+namespace mozilla {
+namespace dom {
+/* This class is used for UA to control devices's speaker status.
+ * After UA set the speaker status, the UA should handle the
+ * forcespeakerchange event and change the speaker status in UI.
+ * The device's speaker status would set back to normal when UA close the application.
+ */
+class SpeakerManager final
+  : public DOMEventTargetHelper
+  , public nsIDOMEventListener
+{
+  friend class SpeakerManagerService;
+  friend class SpeakerManagerServiceChild;
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_NSIDOMEVENTLISTENER
+
+public:
+  void Init(nsPIDOMWindowInner* aWindow);
+
+  nsPIDOMWindowInner* GetParentObject() const;
+
+  virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
+  /**
+   * WebIDL Interface
+   */
+  // Get this api's force speaker setting.
+  bool Forcespeaker();
+  // Force acoustic sound go through speaker. Don't force to speaker if application
+  // stay in the background and re-force when application
+  // go to foreground
+  void SetForcespeaker(bool aEnable);
+  // Get the device's speaker forced setting.
+  bool Speakerforced();
+
+  void SetAudioChannelActive(bool aIsActive);
+  IMPL_EVENT_HANDLER(speakerforcedchange)
+
+  static already_AddRefed<SpeakerManager>
+  Constructor(const GlobalObject& aGlobal, ErrorResult& aRv);
+
+protected:
+  SpeakerManager();
+  ~SpeakerManager();
+  void DispatchSimpleEvent(const nsAString& aStr);
+  // This api's force speaker setting
+  bool mForcespeaker;
+  bool mVisible;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_SpeakerManager_h