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

media/blink/buffered_resource_loader.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 "media/blink/buffered_resource_loader.h"
 
 #include "base/bits.h"
 #include "base/callback_helpers.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/string_number_conversions.h"
@@ skipping 747 matching lines @@
 
   return true;
 }
 
 void BufferedResourceLoader::CancelUponDeferral() {
   cancel_upon_deferral_ = true;
   if (active_loader_ && active_loader_->deferred())
     active_loader_.reset();
 }
 
+int64_t BufferedResourceLoader::GetMemoryUsage() const {
+  return buffer_.forward_bytes() + buffer_.backward_bytes();
+}
+
 bool BufferedResourceLoader::VerifyPartialResponse(
     const WebURLResponse& response) {
   int64 first_byte_position, last_byte_position, instance_size;
   if (!ParseContentRange(response.httpHeaderField("Content-Range").utf8(),
                          &first_byte_position, &last_byte_position,
                          &instance_size)) {
     return false;
   }
 
   if (instance_size != kPositionNotSpecified) {
@@ skipping 36 matching lines @@
 
 void BufferedResourceLoader::Log() {
   media_log_->AddEvent(
       media_log_->CreateBufferedExtentsChangedEvent(
           offset_ - buffer_.backward_bytes(),
           offset_,
           offset_ + buffer_.forward_bytes()));
 }
 
 }  // namespace media