PPAPI: Purposely leak ProxyLock, fix shutdown race

ppapi/shared_impl/ppapi_globals.h

 // 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.
 
 #ifndef PPAPI_SHARED_IMPL_PPAPI_GLOBALS_H_
 #define PPAPI_SHARED_IMPL_PPAPI_GLOBALS_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "base/threading/thread_local.h"  // For testing purposes only.
 #include "ppapi/c/pp_instance.h"
 #include "ppapi/c/pp_module.h"
 #include "ppapi/c/ppb_console.h"
 #include "ppapi/shared_impl/api_id.h"
 #include "ppapi/shared_impl/ppapi_shared_export.h"
 
 namespace base {
-class Lock;
 class MessageLoopProxy;
 class TaskRunner;
 }
 
 namespace ppapi {
 
 class CallbackTracker;
 class MessageLoopShared;
 class ResourceTracker;
 class VarTracker;
@@ skipping 31 matching lines @@
   // PpapiGlobals object must have been constructed using the "PerThreadForTest"
   // parameter.
   static void SetPpapiGlobalsOnThreadForTest(PpapiGlobals* ptr);
 
   // Retrieves the corresponding tracker.
   virtual ResourceTracker* GetResourceTracker() = 0;
   virtual VarTracker* GetVarTracker() = 0;
   virtual CallbackTracker* GetCallbackTrackerForInstance(
       PP_Instance instance) = 0;
 
-  virtual base::Lock* GetProxyLock() = 0;
-
   // Logs the given string to the JS console. If "source" is empty, the name of
   // the current module will be used, if it can be determined.
   virtual void LogWithSource(PP_Instance instance,
                              PP_LogLevel level,
                              const std::string& source,
                              const std::string& value) = 0;
 
   // Like LogWithSource but broadcasts the log to all instances of the given
   // module. The module may be 0 to specify that all consoles possibly
   // associated with the calling code should be notified. This allows us to
@@ skipping 54 matching lines @@
   static PpapiGlobals* GetThreadLocalPointer();
 
   scoped_refptr<base::MessageLoopProxy> main_loop_proxy_;
 
   DISALLOW_COPY_AND_ASSIGN(PpapiGlobals);
 };
 
 }  // namespace ppapi
 
 #endif  // PPAPI_SHARED_IMPL_PPAPI_GLOBALS_H_