Show gpu process stats in about:tcmalloc

content/browser/profiler_controller_impl.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 CONTENT_BROWSER_PROFILER_CONTROLLER_IMPL_H_
 #define CONTENT_BROWSER_PROFILER_CONTROLLER_IMPL_H_
 
 #include "base/memory/singleton.h"
+#include "base/process.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/profiler_controller.h"
 #include "content/public/common/process_type.h"
 
 namespace tracked_objects {
 struct ProcessDataSnapshot;
 }
 
 namespace content {
 
 // ProfilerController's implementation.
 class ProfilerControllerImpl : public ProfilerController {
  public:
   static ProfilerControllerImpl* GetInstance();
 
   // Normally instantiated when the child process is launched. Only one instance
   // should be created per process.
   ProfilerControllerImpl();
   virtual ~ProfilerControllerImpl();
 
   // Notify the |subscriber_| that it should expect at least |pending_processes|
   // additional calls to OnProfilerDataCollected().  OnPendingProcess() may be
   // called repeatedly; the last call will have |end| set to true, indicating
   // that there is no longer a possibility for the count of pending processes to
   // increase.  This is called on the UI thread.
   void OnPendingProcesses(int sequence_number, int pending_processes, bool end);
 
   // Send the |profiler_data| back to the |subscriber_|.
-  // This is called on the UI thread.
+  // This can be called from any thread.
   void OnProfilerDataCollected(
       int sequence_number,
       const tracked_objects::ProcessDataSnapshot& profiler_data,
       content::ProcessType process_type);
 
   // ProfilerController implementation:
   virtual void Register(ProfilerSubscriber* subscriber) OVERRIDE;
   virtual void Unregister(const ProfilerSubscriber* subscriber) OVERRIDE;
   virtual void GetProfilerData(int sequence_number) OVERRIDE;
 
  private:
   friend struct DefaultSingletonTraits<ProfilerControllerImpl>;
 
   // Contact child processes and get their profiler data.
   void GetProfilerDataFromChildProcesses(int sequence_number);
 
   ProfilerSubscriber* subscriber_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfilerControllerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_PROFILER_CONTROLLER_IMPL_H_