Add methods for telling V8 how much memory audio/video is using.

media/blink/webmediaplayer_impl.h

 // Copyright 2013 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.
 
 #ifndef MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 #define MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 216 matching lines @@
   // Parameter order is reversed for easy binding.
   void SetCdm(const CdmAttachedCB& cdm_attached_cb, CdmContext* cdm_context);
 
   // Called when a CDM has been attached to the |pipeline_|.
   void OnCdmAttached(bool success);
 
   // Updates |paused_time_| to the current media time with consideration for the
   // |ended_| state by clamping current time to duration upon |ended_|.
   void UpdatePausedTime();
 
+  // Called at low frequency to tell external observers how much memory we're
+  // using for video playback.  Called by |memory_usage_reporting_timer_|.
+  void ReportMemoryUsage();
+
   blink::WebLocalFrame* frame_;
 
   // TODO(hclam): get rid of these members and read from the pipeline directly.
   blink::WebMediaPlayer::NetworkState network_state_;
   blink::WebMediaPlayer::ReadyState ready_state_;
 
   // Preload state for when |data_source_| is created after setPreload().
   BufferedDataSource::Preload preload_;
 
   // Task runner for posting tasks on Chrome's main thread. Also used
@@ skipping 47 matching lines @@
   bool should_notify_time_changed_;
 
   blink::WebMediaPlayerClient* client_;
   blink::WebMediaPlayerEncryptedMediaClient* encrypted_client_;
 
   base::WeakPtr<WebMediaPlayerDelegate> delegate_;
 
   WebMediaPlayerParams::DeferLoadCB defer_load_cb_;
   WebMediaPlayerParams::Context3DCB context_3d_cb_;
 
+  // Members for notifying upstream clients about internal memory usage.  The
+  // |adjust_allocated_memory_cb_| must only be called on |main_task_runner_|.
+  base::RepeatingTimer memory_usage_reporting_timer_;
+  WebMediaPlayerParams::AdjustAllocatedMemoryCB adjust_allocated_memory_cb_;
+  int64_t last_reported_memory_usage_;
+
   // Routes audio playback to either AudioRendererSink or WebAudio.
   scoped_refptr<WebAudioSourceProviderImpl> audio_source_provider_;
 
   bool supports_save_;
 
   // These two are mutually exclusive:
   //   |data_source_| is used for regular resource loads.
   //   |chunk_demuxer_| is used for Media Source resource loads.
   //
   // |demuxer_| will contain the appropriate demuxer based on which resource
@@ skipping 18 matching lines @@
   scoped_ptr<blink::WebContentDecryptionModuleResult> set_cdm_result_;
 
   scoped_ptr<RendererFactory> renderer_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebMediaPlayerImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIAPLAYER_IMPL_H_