Adds proper IPC usage for AudioDevice::GetAudioHardwareBufferSize().

content/browser/renderer_host/render_message_filter.cc

 // Copyright (c) 2011 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/render_message_filter.h"
 
 #include <map>
 
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 338 matching lines @@
     IPC_MESSAGE_HANDLER(ChildProcessHostMsg_SyncAllocateSharedMemory,
                         OnAllocateSharedMemory)
 #if defined(OS_MACOSX)
     IPC_MESSAGE_HANDLER(ViewHostMsg_AllocTransportDIB, OnAllocTransportDIB)
     IPC_MESSAGE_HANDLER(ViewHostMsg_FreeTransportDIB, OnFreeTransportDIB)
 #endif
     IPC_MESSAGE_HANDLER(ViewHostMsg_DidGenerateCacheableMetadata,
                         OnCacheableMetadataAvailable)
     IPC_MESSAGE_HANDLER_DELAY_REPLY(ViewHostMsg_Keygen, OnKeygen)
     IPC_MESSAGE_HANDLER(ViewHostMsg_AsyncOpenFile, OnAsyncOpenFile)
+    IPC_MESSAGE_HANDLER(ViewHostMsg_GetHardwareBufferSize,
+                        OnGetHardwareBufferSize)
     IPC_MESSAGE_HANDLER(ViewHostMsg_GetHardwareInputSampleRate,
                         OnGetHardwareInputSampleRate)
     IPC_MESSAGE_HANDLER(ViewHostMsg_GetHardwareSampleRate,
                         OnGetHardwareSampleRate)
     IPC_MESSAGE_HANDLER(ViewHostMsg_MediaLogEvent, OnMediaLogEvent)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP_EX()
 
   return handled;
 }
@@ skipping 230 matching lines @@
                                                      int request_id,
                                                      const FilePath& path) {
   plugin_service_->OpenChannelToPpapiBroker(
       path, new OpenChannelToPpapiBrokerCallback(this, routing_id, request_id));
 }
 
 void RenderMessageFilter::OnGenerateRoutingID(int* route_id) {
   *route_id = render_widget_helper_->GetNextRoutingID();
 }
 
+void RenderMessageFilter::OnGetHardwareBufferSize(uint32* buffer_size) {
+  *buffer_size = static_cast<uint32>(media::GetAudioHardwareBufferSize());
+}
+
 void RenderMessageFilter::OnGetHardwareInputSampleRate(double* sample_rate) {
   *sample_rate = media::GetAudioInputHardwareSampleRate();
 }
 
 void RenderMessageFilter::OnGetHardwareSampleRate(double* sample_rate) {
   *sample_rate = media::GetAudioHardwareSampleRate();
 }
 
 void RenderMessageFilter::OnDownloadUrl(const IPC::Message& message,
                                         const GURL& url,
@@ skipping 223 matching lines @@
   ViewHostMsg_GetRawCookies::WriteReplyParams(reply_msg, cookies);
   Send(reply_msg);
 }
 
 void RenderMessageFilter::OnCompletedOpenChannelToNpapiPlugin(
     OpenChannelToNpapiPluginCallback* client) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   DCHECK(ContainsKey(plugin_host_clients_, client));
   plugin_host_clients_.erase(client);
 }