[Android] A prototype of the interactive media notification.

content/public/browser/android/media_controls_delegate.h

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CONTENT_PUBLIC_BROWSER_ANDROID_MEDIA_CONTROLS_DELEGATE_H_
+#define CONTENT_PUBLIC_BROWSER_ANDROID_MEDIA_CONTROLS_DELEGATE_H_
+
+#include "base/macros.h"
+#include "content/common/content_export.h"
+
+namespace content {
+
+// Provides the necessary information to media controls and gets notified about
+// the media controls events.
+class CONTENT_EXPORT MediaControlsDelegate {
+ public:
+  // Called when the user interacts with the Pause control (e.g. taps on a
+  // button).
+  virtual void OnControlsPause() = 0;
+
+  // Called when the user interacts with the Play control (e.g. taps on a
+  // button).
+  virtual void OnControlsResume() = 0;
+
+  // Indicates if the media controls are allowed to affect the state of the
+  // delegate. If returns false, controls should be hidden/disabled.
+  virtual bool IsControllable() = 0;
+
+  // Indicates if the controls should be in the paused state or not.
+  virtual bool IsPaused() = 0;
+
+ protected:
+  MediaControlsDelegate() = default;
+  virtual ~MediaControlsDelegate() = default;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MediaControlsDelegate);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_PUBLIC_BROWSER_ANDROID_MEDIA_CONTROLS_DELEGATE_H_