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

chrome/utility/utility_thread.cc

Index: chrome/utility/utility_thread.cc
===================================================================
--- chrome/utility/utility_thread.cc	(revision 70108)
+++ chrome/utility/utility_thread.cc	(working copy)
@@ -51,7 +51,8 @@
 UtilityThread::~UtilityThread() {
 }
 
-void UtilityThread::OnControlMessageReceived(const IPC::Message& msg) {
+bool UtilityThread::OnControlMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(UtilityThread, msg)
     IPC_MESSAGE_HANDLER(UtilityMsg_UnpackExtension, OnUnpackExtension)
     IPC_MESSAGE_HANDLER(UtilityMsg_UnpackWebResource, OnUnpackWebResource)
@@ -65,7 +66,9 @@
     IPC_MESSAGE_HANDLER(UtilityMsg_BatchMode_Finished, OnBatchModeFinished)
     IPC_MESSAGE_HANDLER(UtilityMsg_GetPrinterCapsAndDefaults,
                         OnGetPrinterCapsAndDefaults)
+    IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
+  return handled;
 }
 
 void UtilityThread::OnUnpackExtension(const FilePath& extension_path) {