Implement renderer AudioDevice API for low-latency audio output...

chrome/browser/renderer_host/render_message_filter.cc

Index: chrome/browser/renderer_host/render_message_filter.cc
===================================================================
--- chrome/browser/renderer_host/render_message_filter.cc	(revision 70546)
+++ chrome/browser/renderer_host/render_message_filter.cc	(working copy)
@@ -280,6 +280,8 @@
                                     OnGetRootWindowRect)
 #endif
 
+    IPC_MESSAGE_HANDLER(ViewHostMsg_GenerateRoutingID, OnGenerateRoutingID)
+
     IPC_MESSAGE_HANDLER(ViewHostMsg_CreateWindow, OnMsgCreateWindow)
     IPC_MESSAGE_HANDLER(ViewHostMsg_CreateWidget, OnMsgCreateWidget)
     IPC_MESSAGE_HANDLER(ViewHostMsg_CreateFullscreenWidget,
@@ -724,6 +726,10 @@
   host->Launch(this, channel_descriptor, reply_msg);
 }
 
+void RenderMessageFilter::OnGenerateRoutingID(int* route_id) {
+  *route_id = render_widget_helper_->GetNextRoutingID();
+}
+
 void RenderMessageFilter::OnDownloadUrl(const IPC::Message& message,
                                         const GURL& url,
                                         const GURL& referrer) {