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

content/renderer/render_frame_impl.cc

 // 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.
 
 #include "content/renderer/render_frame_impl.h"
 
 #include <map>
 #include <string>
 
 #include "base/auto_reset.h"
@@ skipping 2124 matching lines @@
 #endif  // defined(OS_ANDROID) && !defined(ENABLE_MEDIA_PIPELINE_ON_ANDROID)
 
   scoped_refptr<media::MediaLog> media_log(new RenderMediaLog());
   media::WebMediaPlayerParams params(
       base::Bind(&ContentRendererClient::DeferMediaLoad,
                  base::Unretained(GetContentClient()->renderer()),
                  static_cast<RenderFrame*>(this), has_played_media_),
       audio_renderer_sink, media_log, render_thread->GetMediaThreadTaskRunner(),
       render_thread->GetWorkerTaskRunner(),
       render_thread->compositor_task_runner(), context_3d_cb,
+      base::Bind(&v8::Isolate::AdjustAmountOfExternalAllocatedMemory,
+                 base::Unretained(blink::mainThreadIsolate())),

[jochen (gone - plz use gerrit), 2015/10/28 14:41:26]

btw, it's important that you invoke this callback on the mainthread. can you
confirm that?

[haraken, 2015/10/28 14:45:36]

mainThreadIsolate() has ASSERT(isMainThread()).

Or you can use toIsolate(Frame*). The fact that you have a frame means that
you're in the main thread.

https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit...

[DaleCurtis, 2015/10/28 17:56:01]

Yup, main thread callbacks only. WMPI includes a
DCHECK(BelongsToCurrentThread()) too before this callback is executed. I've gone
ahead and added an extra comment in the WMPI code too.

       GetMediaPermission(), initial_cdm);
 
 // TODO(xhwang, watk): Find a better way to specify these ifdef conditions.
 #if defined(OS_ANDROID) && !defined(ENABLE_MEDIA_PIPELINE_ON_ANDROID)
   return CreateAndroidWebMediaPlayer(client, encrypted_client, params);
 #else
 #if defined(ENABLE_MOJO_MEDIA) && !defined(ENABLE_MEDIA_PIPELINE_ON_ANDROID)
   scoped_ptr<media::RendererFactory> media_renderer_factory(
       new media::MojoRendererFactory(GetMediaServiceFactory()));
 #else
@@ skipping 3106 matching lines @@
   mojo::ServiceProviderPtr service_provider;
   mojo::URLRequestPtr request(mojo::URLRequest::New());
   request->url = mojo::String::From(url);
   mojo_shell_->ConnectToApplication(request.Pass(), GetProxy(&service_provider),
                                     nullptr, nullptr,
                                     base::Bind(&OnGotContentHandlerID));
   return service_provider.Pass();
 }
 
 }  // namespace content