Allow MediaSession in iframes to be routed

content/browser/media/session/pepper_player_delegate.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/session/pepper_player_delegate.h"
 
 #include "content/browser/frame_host/render_frame_host_impl.h"
 #include "content/browser/media/session/pepper_playback_observer.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/frame_messages.h"
@@ skipping 41 matching lines @@
 
 void PepperPlayerDelegate::OnSetVolumeMultiplier(int player_id,
                                                  double volume_multiplier) {
   if (!ShouldDuckFlash())
     return;
 
   DCHECK_EQ(player_id, kPlayerId);
   SetVolume(player_id, volume_multiplier);
 }
 
+RenderFrameHost* PepperPlayerDelegate::GetRenderFrameHost() const {
+  return nullptr;

[whywhat, 2016/12/01 22:13:00]

if pepper player's RFH is always null, why do we iterate over them to find one
in media_session_impl.cc?

[Zhiqiang Zhang (Slow), 2016/12/02 14:17:28]

Ditto http://crbug.com/670273. Added a TODO here.

+}
+
 void PepperPlayerDelegate::SetVolume(int player_id, double volume) {
   contents_->Send(new FrameMsg_SetPepperVolume(
       contents_->GetMainFrame()->routing_id(), pp_instance_, volume));
 }
 
 }  // namespace content