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

chrome/profile_import/profile_import_thread.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/profile_import/profile_import_thread.h"
 
 #include <algorithm>
 
 #include "base/values.h"
 #include "chrome/browser/importer/importer.h"
@@ skipping 16 matching lines @@
 ProfileImportThread::ProfileImportThread()
     : bridge_(NULL),
       browser_type_(0),
       items_to_import_(0),
       importer_(NULL) {
   ChildProcess::current()->AddRefProcess();  // Balanced in Cleanup().
 }
 
 ProfileImportThread::~ProfileImportThread() {}
 
-void ProfileImportThread::OnControlMessageReceived(const IPC::Message& msg) {
+bool ProfileImportThread::OnControlMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
   IPC_BEGIN_MESSAGE_MAP(ProfileImportThread, msg)
     IPC_MESSAGE_HANDLER(ProfileImportProcessMsg_StartImport,
                         OnImportStart)
     IPC_MESSAGE_HANDLER(ProfileImportProcessMsg_CancelImport,
                         OnImportCancel)
     IPC_MESSAGE_HANDLER(ProfileImportProcessMsg_ReportImportItemFinished,
                         OnImportItemFinished)
+    IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
+  return handled;
 }
 
 void ProfileImportThread::OnImportStart(
     const ProfileInfo& profile_info,
     int items,
     const DictionaryValue& localized_strings,
     bool import_to_bookmark_bar) {
   bridge_ = new ExternalProcessImporterBridge(this, localized_strings);
 
   scoped_refptr<ImporterList> importer_list(new ImporterList);
@@ skipping 130 matching lines @@
   Send(new ProfileImportProcessHostMsg_NotifyKeywordsReady(urls,
       default_keyword_index, unique_on_host_and_path));
 }
 
 void ProfileImportThread::Cleanup() {
   importer_->Cancel();
   importer_ = NULL;
   bridge_ = NULL;
   ChildProcess::current()->ReleaseProcess();
 }