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/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "build/build_config.h"
 #include "content/browser/power_save_blocker_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
 #include "content/common/frame_messages.h"
 #include "content/public/browser/render_frame_host.h"
 #include "content/public/browser/web_contents.h"
 #include "ipc/ipc_message_macros.h"
+#include "media/base/bind_to_current_loop.h"
 
 namespace content {
 
 MediaWebContentsObserver::MediaWebContentsObserver(WebContents* web_contents)
     : WebContentsObserver(web_contents) {}
 
 MediaWebContentsObserver::~MediaWebContentsObserver() {}
 
 void MediaWebContentsObserver::RenderFrameDeleted(
     RenderFrameHost* render_frame_host) {
@@ skipping 33 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::HasAudioFocus(int render_process_id,
+                                             int render_frame_id,
+                                             const base::Closure& on_focus_cb) {
+  if (!BrowserThread::CurrentlyOn(BrowserThread::UI)) {
+    BrowserThread::PostTask(
+        BrowserThread::UI, FROM_HERE,
+        base::Bind(&MediaWebContentsObserver::HasAudioFocus, render_process_id,
+                   render_frame_id, media::BindToCurrentLoop(on_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->CheckFocus(render_frame_id, on_focus_cb);
+}
+
+void MediaWebContentsObserver::CheckFocus(int render_frame_id,
+                                          const base::Closure& on_focus_cb) {
+  NOTIMPLEMENTED();
+}
+
 void MediaWebContentsObserver::OnMediaDestroyedNotification(
     RenderFrameHost* render_frame_host,
     int64_t player_cookie) {
   OnMediaPausedNotification(render_frame_host, player_cookie, true);
 }
 
 void MediaWebContentsObserver::OnMediaPlayingNotification(
     RenderFrameHost* render_frame_host,
     int64_t player_cookie,
     bool has_video,
@@ skipping 135 matching lines @@
   if (it == player_map->end())
     return;
 
   for (int64_t player_cookie : it->second)
     removed_players->insert(MediaPlayerId(render_frame_host, player_cookie));
 
   player_map->erase(it);
 }
 
 }  // namespace content