Move chrome://media-internals to content. This allows us to hide implementation details from the pu…

content/browser/media/media_internals.h

 // Copyright (c) 2012 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 CHROME_BROWSER_MEDIA_MEDIA_INTERNALS_H_
-#define CHROME_BROWSER_MEDIA_MEDIA_INTERNALS_H_
+#ifndef CONTENT_BROWSER_MEDIA_MEDIA_INTERNALS_H_
+#define CONTENT_BROWSER_MEDIA_MEDIA_INTERNALS_H_
 
 #include <string>
+#include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/singleton.h"
-#include "base/observer_list.h"
+#include "base/string16.h"
 #include "base/values.h"
-#include "content/public/browser/media_observer.h"
+#include "content/common/content_export.h"
 #include "content/public/common/media_stream_request.h"
 
-class MediaCaptureDevicesDispatcher;
-class MediaInternalsObserver;
-class MediaStreamCaptureIndicator;
-class Profile;
+namespace media {
+struct MediaLogEvent;
+}
 
-namespace media {
-
-struct MediaLogEvent;
-
-// Helper to get the default devices which can be used by the media request,
-// if the return list is empty, it means there is no available device on the OS.
-// Called on the UI thread.
-void GetDefaultDevicesForProfile(Profile* profile,
-                                 bool audio,
-                                 bool video,
-                                 content::MediaStreamDevices* devices);
-
-// Helper for picking the device that was requested for an OpenDevice request.
-// If the device requested is not available it will revert to using the first
-// available one instead or will return an empty list if no devices of the
-// requested kind are present.
-void GetRequestedDevice(const std::string& requested_device_id,
-                        bool audio,
-                        bool video,
-                        content::MediaStreamDevices* devices);
-}
+namespace content {
 
 // This class stores information about currently active media.
 // It's constructed on the UI thread but all of its methods are called on the IO
 // thread.
-class MediaInternals : public content::MediaObserver {
+class CONTENT_EXPORT MediaInternals {
  public:
   virtual ~MediaInternals();
 
   static MediaInternals* GetInstance();
 
-  // Overridden from content::MediaObserver:
-  virtual void OnDeleteAudioStream(void* host, int stream_id) OVERRIDE;
-  virtual void OnSetAudioStreamPlaying(void* host,
-                                       int stream_id,
-                                       bool playing) OVERRIDE;
-  virtual void OnSetAudioStreamStatus(void* host,
-                                      int stream_id,
-                                      const std::string& status) OVERRIDE;
-  virtual void OnSetAudioStreamVolume(void* host,
-                                      int stream_id,
-                                      double volume) OVERRIDE;
+  // The following methods are virtual for gmock.
+
+  // Called when an audio stream is deleted.
+  virtual void OnDeleteAudioStream(void* host, int stream_id);
+
+  // Called when an audio stream is set to playing or paused.
+  virtual void OnSetAudioStreamPlaying(void* host, int stream_id,
+                                       bool playing);
+
+  // Called when the status of an audio stream is set to "created", "flushed",
+  // "closed", or "error".
+  virtual void OnSetAudioStreamStatus(void* host, int stream_id,
+                                      const std::string& status);
+
+  // Called when the volume of an audio stream is set.
+  virtual void OnSetAudioStreamVolume(void* host, int stream_id,
+                                      double volume);
+
+  // Called when a MediaEvent occurs.
   virtual void OnMediaEvent(int render_process_id,
-                            const media::MediaLogEvent& event) OVERRIDE;
-  virtual void OnCaptureDevicesOpened(
-      int render_process_id,
-      int render_view_id,
-      const content::MediaStreamDevices& devices) OVERRIDE;
-  virtual void OnCaptureDevicesClosed(
-      int render_process_id,
-      int render_view_id,
-      const content::MediaStreamDevices& devices) OVERRIDE;
-  virtual void OnAudioCaptureDevicesChanged(
-      const content::MediaStreamDevices& devices) OVERRIDE;
-  virtual void OnVideoCaptureDevicesChanged(
-      const content::MediaStreamDevices& devices) OVERRIDE;
-  virtual void OnMediaRequestStateChanged(
-      int render_process_id,
-      int render_view_id,
-      const content::MediaStreamDevice& device,
-      content::MediaRequestState state) OVERRIDE;
+                            const media::MediaLogEvent& event);
 
-  // Methods for observers.
-  // Observers should add themselves on construction and remove themselves
-  // on destruction.
-  void AddObserver(MediaInternalsObserver* observer);
-  void RemoveObserver(MediaInternalsObserver* observer);
+  // Called with the update string.
+  typedef base::Callback<void(const string16&)> UpdateCallback;
+
+  // Add/remove update callbacks (see above).
+  void AddUpdateCallback(const UpdateCallback& callback);
+  void RemoveUpdateCallback(const UpdateCallback& callback);
   void SendEverything();
 
-  scoped_refptr<MediaStreamCaptureIndicator> GetMediaStreamCaptureIndicator();
-  scoped_refptr<MediaCaptureDevicesDispatcher>
-      GetMediaCaptureDevicesDispatcher();
-
  private:
+  friend class MockMediaInternals;
   friend class MediaInternalsTest;
   friend struct DefaultSingletonTraits<MediaInternals>;
 
   MediaInternals();
 
   // Sets |property| of an audio stream to |value| and notifies observers.
   // (host, stream_id) is a unique id for the audio stream.
   // |host| will never be dereferenced.
   void UpdateAudioStream(void* host, int stream_id,
                          const std::string& property, Value* value);
 
   // Removes |item| from |data_|.
   void DeleteItem(const std::string& item);
 
   // Sets data_.id.property = value and notifies attached UIs using update_fn.
   // id may be any depth, e.g. "video.decoders.1.2.3"
   void UpdateItem(const std::string& update_fn, const std::string& id,
                   const std::string& property, Value* value);
 
   // Calls javascript |function|(|value|) on each attached UI.
   void SendUpdate(const std::string& function, Value* value);
 
   DictionaryValue data_;
-  ObserverList<MediaInternalsObserver> observers_;
-  scoped_refptr<MediaStreamCaptureIndicator> media_stream_capture_indicator_;
-  scoped_refptr<MediaCaptureDevicesDispatcher> media_devices_dispatcher_;
+
+  std::vector<UpdateCallback> update_callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(MediaInternals);
 };
 
-#endif  // CHROME_BROWSER_MEDIA_MEDIA_INTERNALS_H_
+} // namespace content
+
+#endif  // CONTENT_BROWSER_MEDIA_MEDIA_INTERNALS_H_