Make SharedMemory track the size that was actually mapped

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/metrics/histogram.h"
 #include "base/process.h"
 #include "base/shared_memory.h"
@@ skipping 164 matching lines @@
   if (!reader->PrepareForeignSocketHandle(peer_handle(),
                                           &foreign_socket_handle)) {
     DeleteEntryOnError(entry);
     return;
   }
 
   Send(new AudioMsg_NotifyStreamCreated(
       entry->stream_id,
       foreign_memory_handle,
       foreign_socket_handle,
-      media::PacketSizeInBytes(entry->shared_memory.created_size())));
+      media::PacketSizeInBytes(entry->shared_memory.requested_size())));
 }
 
 void AudioRendererHost::DoSendPlayingMessage(
     media::AudioOutputController* controller) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   AudioEntry* entry = LookupByController(controller);
   if (!entry)
     return;
 
@@ skipping 330 matching lines @@
   return NULL;
 }
 
 media::AudioOutputController* AudioRendererHost::LookupControllerByIdForTesting(
     int stream_id) {
   AudioEntry* const entry = LookupById(stream_id);
   return entry ? entry->controller : NULL;
 }
 
 }  // namespace content