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

chrome/test/automation/tab_proxy.cc

 // Copyright (c) 2010 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 "chrome/test/automation/tab_proxy.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "base/string16.h"
@@ skipping 772 matching lines @@
   AutoLock lock(list_lock_);
   observers_list_.AddObserver(observer);
 }
 
 void TabProxy::RemoveObserver(TabProxyDelegate* observer) {
   AutoLock lock(list_lock_);
   observers_list_.RemoveObserver(observer);
 }
 
 // Called on Channel background thread, if TabMessages filter is installed.
-void TabProxy::OnMessageReceived(const IPC::Message& message) {
+bool TabProxy::OnMessageReceived(const IPC::Message& message) {
   AutoLock lock(list_lock_);
   FOR_EACH_OBSERVER(TabProxyDelegate, observers_list_,
                     OnMessageReceived(this, message));
+  return true;
 }
 
 void TabProxy::OnChannelError() {
   AutoLock lock(list_lock_);
   FOR_EACH_OBSERVER(TabProxyDelegate, observers_list_, OnChannelError(this));
 }
 
 TabProxy::~TabProxy() {}
 
 bool TabProxy::ExecuteJavaScriptAndGetJSON(const std::string& script,
                                            std::string* json) {
   if (!is_valid())
     return false;
   if (!json) {
     NOTREACHED();
     return false;
   }
   return sender_->Send(new AutomationMsg_DomOperation(handle_, L"",
                                                       UTF8ToWide(script),
                                                       json));
 }
 
 void TabProxy::FirstObjectAdded() {
   AddRef();
 }
 
 void TabProxy::LastObjectRemoved() {
   Release();
 }