PPAPI: Purposely leak ProxyLock, fix shutdown race

ppapi/proxy/plugin_globals.cc

 // Copyright (c) 2012 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 "ppapi/proxy/plugin_globals.h"
 
 #include "base/task_runner.h"
 #include "base/threading/thread.h"
 #include "ipc/ipc_message.h"
 #include "ipc/ipc_sender.h"
@@ skipping 110 matching lines @@
 
 std::string PluginGlobals::GetCmdLine() {
   return command_line_;
 }
 
 void PluginGlobals::PreCacheFontForFlash(const void* logfontw) {
   ProxyAutoUnlock unlock;
   plugin_proxy_delegate_->PreCacheFont(logfontw);
 }
 
-base::Lock* PluginGlobals::GetProxyLock() {
-  return &proxy_lock_;
-}
-
 void PluginGlobals::LogWithSource(PP_Instance instance,
                                   PP_LogLevel level,
                                   const std::string& source,
                                   const std::string& value) {
   const std::string& fixed_up_source = source.empty() ? plugin_name_ : source;
   PluginDispatcher::LogWithSource(instance, level, fixed_up_source, value);
 }
 
 void PluginGlobals::BroadcastLogWithSource(PP_Module /* module */,
                                            PP_LogLevel level,
@@ skipping 48 matching lines @@
 MessageLoopResource* PluginGlobals::loop_for_main_thread() {
   return loop_for_main_thread_.get();
 }
 
 bool PluginGlobals::IsPluginGlobals() const {
   return true;
 }
 
 }  // namespace proxy
 }  // namespace ppapi