Add missing base::lock usage.

ceee/ie/plugin/bho/window_message_source.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.
 //
 // Window message source implementation.
 #include "ceee/ie/plugin/bho/window_message_source.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "ceee/common/window_utils.h"
 #include "ceee/common/windows_constants.h"
 #include "ceee/ie/common/ceee_module_util.h"
 
 WindowMessageSource::MessageSourceMap WindowMessageSource::message_source_map_;
-Lock WindowMessageSource::lock_;
+base::Lock WindowMessageSource::lock_;
 
 WindowMessageSource::WindowMessageSource()
     : create_thread_id_(::GetCurrentThreadId()),
       get_message_hook_(NULL),
       call_wnd_proc_ret_hook_(NULL) {
 }
 
 WindowMessageSource::~WindowMessageSource() {
   DCHECK(get_message_hook_ == NULL);
   DCHECK(call_wnd_proc_ret_hook_ == NULL);
@@ skipping 184 matching lines @@
   base::AutoLock auto_lock(lock_);
   MessageSourceMap::const_iterator iter = message_source_map_.find(thread_id);
   return iter == message_source_map_.end() ? NULL : iter->second;
 }
 
 // static
 void WindowMessageSource::RemoveEntryFromMap(DWORD thread_id) {
   base::AutoLock auto_lock(lock_);
   message_source_map_.erase(thread_id);
 }