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

media/blink/webmediaplayer_params.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_PARAMS_H_
 #define MEDIA_BLINK_WEBMEDIAPLAYER_PARAMS_H_
 
 #include "base/callback.h"
 #include "base/memory/ref_counted.h"
 #include "media/base/media_export.h"
@@ skipping 14 matching lines @@
 class AudioRendererSink;
 class MediaLog;
 class MediaPermission;
 
 // Holds parameters for constructing WebMediaPlayerImpl without having
 // to plumb arguments through various abstraction layers.
 class MEDIA_EXPORT WebMediaPlayerParams {
  public:
   typedef base::Callback<void(const base::Closure&)> DeferLoadCB;
   typedef base::Callback<Context3D()> Context3DCB;
+  typedef base::Callback<int64_t(int64_t)> AdjustAllocatedMemoryCB;

[xhwang, 2015/10/25 17:01:56]

Please add a comment for this callback. It wasn't super clear to me what the
parameter is until I see how the callback is used. It's really reporting the
difference of memory usage since last report (hence "adjust"). For people not
familiar with the v8 code this isn't obvious.

[DaleCurtis, 2015/10/27 23:14:20]

Done.

 
   // |defer_load_cb|, |audio_renderer_sink|, |compositor_task_runner|, and
   // |context_3d_cb| may be null.
   WebMediaPlayerParams(
       const DeferLoadCB& defer_load_cb,
       const scoped_refptr<AudioRendererSink>& audio_renderer_sink,
       const scoped_refptr<MediaLog>& media_log,
       const scoped_refptr<base::SingleThreadTaskRunner>& media_task_runner,
       const scoped_refptr<base::TaskRunner>& worker_task_runner,
       const scoped_refptr<base::SingleThreadTaskRunner>& compositor_task_runner,
       const Context3DCB& context_3d,
+      const AdjustAllocatedMemoryCB& adjust_allocated_memory_cb,
       MediaPermission* media_permission,
       blink::WebContentDecryptionModule* initial_cdm);
 
   ~WebMediaPlayerParams();
 
   DeferLoadCB defer_load_cb() const { return defer_load_cb_; }
 
   const scoped_refptr<AudioRendererSink>& audio_renderer_sink() const {
     return audio_renderer_sink_;
   }
@@ skipping 16 matching lines @@
   }
 
   Context3DCB context_3d_cb() const { return context_3d_cb_; }
 
   MediaPermission* media_permission() const { return media_permission_; }
 
   blink::WebContentDecryptionModule* initial_cdm() const {
     return initial_cdm_;
   }
 
+  AdjustAllocatedMemoryCB adjust_allocated_memory_cb() const {
+    return adjust_allocated_memory_cb_;
+  }
 
  private:
   DeferLoadCB defer_load_cb_;
   scoped_refptr<AudioRendererSink> audio_renderer_sink_;
   scoped_refptr<MediaLog> media_log_;
   scoped_refptr<base::SingleThreadTaskRunner> media_task_runner_;
   scoped_refptr<base::TaskRunner> worker_task_runner_;
   scoped_refptr<base::SingleThreadTaskRunner> compositor_task_runner_;
   Context3DCB context_3d_cb_;
+  AdjustAllocatedMemoryCB adjust_allocated_memory_cb_;
 
   // TODO(xhwang): Remove after prefixed EME API support is removed.
   MediaPermission* media_permission_;
   blink::WebContentDecryptionModule* initial_cdm_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(WebMediaPlayerParams);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBMEDIAPLAYER_PARAMS_H_