Plumb audio focus support for spitzer clients.

content/browser/media/media_web_contents_observer.cc

 // Copyright 2014 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/media_web_contents_observer.h"
 
 #include "base/lazy_instance.h"
 #include "base/memory/scoped_ptr.h"
 #include "build/build_config.h"
 #include "content/browser/media/audible_metrics.h"
 #include "content/browser/media/audio_stream_monitor.h"
 #include "content/browser/power_save_blocker_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/media/media_player_delegate_messages.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
+#include "media/base/bind_to_current_loop.h"
 #include "ipc/ipc_message_macros.h"
 
 namespace content {
 
 namespace {
 
 static base::LazyInstance<AudibleMetrics>::Leaky g_audible_metrics =
     LAZY_INSTANCE_INITIALIZER;
 
 }  // anonymous namespace
@@ skipping 53 matching lines @@
     CreateVideoPowerSaveBlocker();
 }
 
 void MediaWebContentsObserver::WasHidden() {
   // If there are entities capturing screenshots or video (e.g., mirroring),
   // don't release the power save blocker.
   if (!web_contents()->GetCapturerCount())
     video_power_save_blocker_.reset();
 }
 
+// static
+void MediaWebContentsObserver::WaitForAudioFocusAsync(
+    int render_process_id,
+    int render_frame_id,
+    const base::Closure& focus_cb) {
+  if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
+    BrowserThread::PostTask(
+        BrowserThread::UI, FROM_HERE,
+        base::Bind(&MediaWebContentsObserver::WaitForAudioFocusAsync,
+                   render_process_id, render_frame_id,
+                   media::BindToCurrentLoop(focus_cb)));
+    return;
+  }
+  WebContents* web_contents = WebContents::FromRenderFrameHost(
+      RenderFrameHost::FromID(render_process_id, render_frame_id));
+  if (!web_contents)
+    return;
+  MediaWebContentsObserver* p_this = static_cast<WebContentsImpl*>(web_contents)
+                                         ->media_web_contents_observer();
+  p_this->WaitForAudioFocusAsyncInternal(render_frame_id, focus_cb);
+}
+
+void MediaWebContentsObserver::WaitForAudioFocusAsyncInternal(
+    int render_frame_id,
+    const base::Closure& focus_cb) {
+  NOTIMPLEMENTED();
+}
+
 void MediaWebContentsObserver::OnMediaDestroyed(
     RenderFrameHost* render_frame_host,
     int delegate_id) {
   OnMediaPaused(render_frame_host, delegate_id, true);
 }
 
-
 void MediaWebContentsObserver::OnMediaPaused(RenderFrameHost* render_frame_host,
                                              int delegate_id,
                                              bool reached_end_of_stream) {
   const MediaPlayerId id(render_frame_host, delegate_id);
   const bool removed_audio = RemoveMediaPlayerEntry(id, &active_audio_players_);
   const bool removed_video = RemoveMediaPlayerEntry(id, &active_video_players_);
   MaybeReleasePowerSaveBlockers();
 
   if (removed_audio || removed_video) {
     // Notify observers the player has been "paused".
@@ skipping 127 matching lines @@
   if (it == player_map->end())
     return;
 
   for (int delegate_id : it->second)
     removed_players->insert(MediaPlayerId(render_frame_host, delegate_id));
 
   player_map->erase(it);
 }
 
 }  // namespace content