Implement MediaMetadata artwork in content

content/browser/media/android/media_web_contents_observer_android.cc

 // Copyright 2016 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.
 
 #include "content/browser/media/android/media_web_contents_observer_android.h"
 
+#include <utility>
+
 #include "base/memory/ptr_util.h"
 #include "content/browser/media/android/browser_media_player_manager.h"
 #include "content/browser/media/android/browser_media_session_manager.h"
 #include "content/browser/media/android/browser_surface_view_manager.h"
 #include "content/browser/media/cdm/browser_cdm_manager.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/media/media_player_delegate_messages.h"
 #include "content/common/media/media_player_messages_android.h"
 #include "content/common/media/media_session_messages_android.h"
 #include "content/common/media/surface_view_manager_messages_android.h"
@@ skipping 56 matching lines @@
   auto it = surface_view_managers_.find(render_frame_host);
   if (it != surface_view_managers_.end())
     return it->second;
 
   BrowserSurfaceViewManager* manager =
       new BrowserSurfaceViewManager(render_frame_host);
   surface_view_managers_.set(render_frame_host, base::WrapUnique(manager));
   return manager;
 }
 
+void MediaWebContentsObserverAndroid::SetMediaSessionManagerForTest(
+    RenderFrameHost* render_frame_host,
+    std::unique_ptr<BrowserMediaSessionManager>& manager) {
+  media_session_managers_.set(
+      render_frame_host,
+      std::forward<std::unique_ptr<BrowserMediaSessionManager>>(manager));

[dcheng, 2016/07/06 02:34:15]

This should just be std::move(manager) (once the arg is passed by value)

[Zhiqiang Zhang (Slow), 2016/07/06 15:38:38]

Done.

+}
+
 void MediaWebContentsObserverAndroid::SuspendAllMediaPlayers() {
   web_contents()->ForEachFrame(
       base::Bind(&SuspendAllMediaPlayersInRenderFrame));
 }
 
 bool MediaWebContentsObserverAndroid::RequestPlay(
     RenderFrameHost* render_frame_host,
     int delegate_id,
     bool has_audio,
     bool is_remote,
@@ skipping 184 matching lines @@
     NOTREACHED() << "OnSetCdm: CDM not found for " << cdm_id;
     return;
   }
 
   // TODO(xhwang): This could possibly fail. In that case we should reject the
   // promise.
   media_player->SetCdm(cdm);
 }
 
 }  // namespace content