Make IPC::Channel::Listener:OnMessageReceived have a return value indicating ...

chrome/renderer/webworker_proxy.cc

Index: chrome/renderer/webworker_proxy.cc
===================================================================
--- chrome/renderer/webworker_proxy.cc	(revision 70108)
+++ chrome/renderer/webworker_proxy.cc	(working copy)
@@ -84,10 +84,11 @@
 void WebWorkerProxy::clientDestroyed() {
 }
 
-void WebWorkerProxy::OnMessageReceived(const IPC::Message& message) {
+bool WebWorkerProxy::OnMessageReceived(const IPC::Message& message) {
   if (!client_)
-    return;
+    return false;
 
+  bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(WebWorkerProxy, message)
     IPC_MESSAGE_HANDLER(ViewMsg_WorkerCreated, OnWorkerCreated)
     IPC_MESSAGE_HANDLER(WorkerMsg_PostMessage, OnPostMessage)
@@ -105,7 +106,9 @@
     IPC_MESSAGE_FORWARD(WorkerHostMsg_WorkerContextDestroyed,
                         static_cast<WebCommonWorkerClient*>(client_),
                         WebCommonWorkerClient::workerContextDestroyed)
+    IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
+  return handled;
 }
 
 void WebWorkerProxy::OnWorkerCreated() {