Gardening: Revert "Use AudioStreamMonitor to control power save blocking."

content/browser/renderer_host/media/audio_renderer_host.cc

 // Copyright (c) 2012 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/renderer_host/media/audio_renderer_host.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/memory/shared_memory.h"
 #include "base/metrics/histogram.h"
 #include "base/process/process.h"
 #include "content/browser/browser_main_loop.h"
-#include "content/browser/media/audio_stream_monitor.h"
 #include "content/browser/media/capture/audio_mirroring_manager.h"
 #include "content/browser/media/media_internals.h"
 #include "content/browser/renderer_host/media/audio_input_device_manager.h"
 #include "content/browser/renderer_host/media/audio_sync_reader.h"
 #include "content/browser/renderer_host/media/media_stream_manager.h"
 #include "content/common/media/audio_messages.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/media_observer.h"
 #include "content/public/common/content_switches.h"
 #include "media/audio/audio_manager_base.h"
@@ skipping 235 matching lines @@
 
   AudioEntry* const entry = LookupById(stream_id);
   if (!entry)
     return;
 
   Send(new AudioMsg_NotifyStreamStateChanged(
       stream_id,
       is_playing ? media::AudioOutputIPCDelegate::kPlaying
                  : media::AudioOutputIPCDelegate::kPaused));
 
-  if (is_playing) {
-    AudioStreamMonitor::StartMonitoringStream(
-        render_process_id_,
-        entry->render_frame_id(),
-        entry->stream_id(),
-        base::Bind(&media::AudioOutputController::ReadCurrentPowerAndClip,
-                   entry->controller()));
-    // TODO(dalecurtis): See about using AudioStreamMonitor instead.
-    if (!entry->playing()) {
-      entry->set_playing(true);
-      base::AtomicRefCountInc(&num_playing_streams_);
-    }
-  } else {
-    AudioStreamMonitor::StopMonitoringStream(
-        render_process_id_, entry->render_frame_id(), entry->stream_id());
-    // TODO(dalecurtis): See about using AudioStreamMonitor instead.
-    if (entry->playing()) {
-      entry->set_playing(false);
-      base::AtomicRefCountDec(&num_playing_streams_);
+  MediaObserver* const media_observer =
+      GetContentClient()->browser()->GetMediaObserver();
+  if (media_observer) {
+    if (is_playing) {
+      media_observer->OnAudioStreamPlaying(
+          render_process_id_,
+          entry->render_frame_id(),
+          entry->stream_id(),
+          base::Bind(&media::AudioOutputController::ReadCurrentPowerAndClip,
+                     entry->controller()));
+      if (!entry->playing()) {
+        entry->set_playing(true);
+        base::AtomicRefCountInc(&num_playing_streams_);
+      }
+    } else {
+      media_observer->OnAudioStreamStopped(render_process_id_,
+                                           entry->render_frame_id(),
+                                           entry->stream_id());
+      if (entry->playing()) {
+        entry->set_playing(false);
+        base::AtomicRefCountDec(&num_playing_streams_);
+      }
     }
   }
 }
 
 RenderViewHost::AudioOutputControllerList
 AudioRendererHost::DoGetOutputControllers(int render_view_id) const {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   RenderViewHost::AudioOutputControllerList controllers;
   AudioEntryMap::const_iterator it = audio_entries_.begin();
@@ skipping 147 matching lines @@
   media::AudioOutputController* const controller = entry->controller();
   if (mirroring_manager_)
     mirroring_manager_->RemoveDiverter(controller);
   controller->Close(
       base::Bind(&AudioRendererHost::DeleteEntry, this, base::Passed(&entry)));
   audio_log_->OnClosed(stream_id);
 }
 
 void AudioRendererHost::DeleteEntry(scoped_ptr<AudioEntry> entry) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
-  AudioStreamMonitor::StopMonitoringStream(
-      render_process_id_, entry->render_frame_id(), entry->stream_id());
-  if (entry->playing())
-    base::AtomicRefCountDec(&num_playing_streams_);
+
+  // At this point, make the final "say" in audio playback state.
+  MediaObserver* const media_observer =
+      GetContentClient()->browser()->GetMediaObserver();
+  if (media_observer) {
+    media_observer->OnAudioStreamStopped(render_process_id_,
+                                         entry->render_frame_id(),
+                                         entry->stream_id());
+    if (entry->playing())
+      base::AtomicRefCountDec(&num_playing_streams_);
+  }
 }
 
 void AudioRendererHost::ReportErrorAndClose(int stream_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   // Make sure this isn't a stray callback executing after the stream has been
   // closed, so error notifications aren't sent after clients believe the stream
   // is closed.
   if (!LookupById(stream_id))
     return;
 
   SendErrorMessage(stream_id);
 
   audio_log_->OnError(stream_id);
   OnCloseStream(stream_id);
 }
 
 AudioRendererHost::AudioEntry* AudioRendererHost::LookupById(int stream_id) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   AudioEntryMap::const_iterator i = audio_entries_.find(stream_id);
   return i != audio_entries_.end() ? i->second : NULL;
 }
 
 bool AudioRendererHost::HasActiveAudio() {
   return !base::AtomicRefCountIsZero(&num_playing_streams_);
 }
 
 }  // namespace content