Add CombinedDesktopMediaList class

chrome/browser/ui/cocoa/media_picker/desktop_media_picker_bridge.h

 // Copyright 2013 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_UI_COCOA_MEDIA_PICKER_DESKTOP_MEDIA_PICKER_BRIDGE_H_
 #define CHROME_BROWSER_UI_COCOA_MEDIA_PICKER_DESKTOP_MEDIA_PICKER_BRIDGE_H_
 
 #include "base/macros.h"
+#include "chrome/browser/media/desktop_media_list.h"
 #include "chrome/browser/media/desktop_media_list_observer.h"
 
 // Protocol corresponding to |DesktopMediaListObserver|.
 @protocol DesktopMediaPickerObserver
 - (void)sourceAddedAtIndex:(int)index;
 - (void)sourceRemovedAtIndex:(int)index;
 - (void)sourceMovedFrom:(int)oldIndex to:(int)newIndex;
 - (void)sourceNameChangedAtIndex:(int)index;
 - (void)sourceThumbnailChangedAtIndex:(int)index;
 @end
 
 // Provides a |DesktopMediaListObserver| implementation that forwards
 // notifications to a objective-c object implementing the
 // |DesktopMediaPickerObserver| protocol.
 class DesktopMediaPickerBridge : public DesktopMediaListObserver {
  public:
   DesktopMediaPickerBridge(id<DesktopMediaPickerObserver> observer);
   ~DesktopMediaPickerBridge() override;
 
   // DesktopMediaListObserver overrides.
-  void OnSourceAdded(int index) override;
-  void OnSourceRemoved(int index) override;
-  void OnSourceMoved(int old_index, int new_index) override;
-  void OnSourceNameChanged(int index) override;
-  void OnSourceThumbnailChanged(int index) override;
+  void OnSourceAdded(DesktopMediaList* list, int index) override;
+  void OnSourceRemoved(DesktopMediaList* list, int index) override;
+  void OnSourceMoved(DesktopMediaList* list,
+                     int old_index,
+                     int new_index) override;
+  void OnSourceNameChanged(DesktopMediaList* list, int index) override;
+  void OnSourceThumbnailChanged(DesktopMediaList* list, int index) override;
 
  private:
   id<DesktopMediaPickerObserver> observer_;  // weak; owns this
 
   DISALLOW_COPY_AND_ASSIGN(DesktopMediaPickerBridge);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_MEDIA_PICKER_DESKTOP_MEDIA_PICKER_BRIDGE_H_