Show gpu process stats in about:tcmalloc

chrome/browser/metrics/tracking_synchronizer.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 CHROME_BROWSER_METRICS_TRACKING_SYNCHRONIZER_H_
 #define CHROME_BROWSER_METRICS_TRACKING_SYNCHRONIZER_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 60 matching lines @@
 
   // Send profiler_data back to callback_object_ by calling
   // DecrementPendingProcessesAndSendData which records that we are waiting
   // for one less profiler data from renderer or browser child process for the
   // given sequence number. This method is accessible on UI thread.
   virtual void OnProfilerDataCollected(
       int sequence_number,
       const tracked_objects::ProcessDataSnapshot& profiler_data,
       content::ProcessType process_type) OVERRIDE;
 
+#if defined(USE_TCMALLOC)
+  virtual void OnTcmallocStatsCollected(
+      base::ProcessId pid,
+      content::ProcessType process_type,
+      const std::string& output) OVERRIDE;
+#endif
+
   // Establish a new sequence_number_, and use it to notify all the processes of
   // the need to supply, to the browser, their tracking data. It also registers
   // |callback_object| in |outstanding_requests_| map. Return the
   // sequence_number_ that was used. This method is accessible on UI thread.
   int RegisterAndNotifyAllProcesses(
       const base::WeakPtr<TrackingSynchronizerObserver>& callback_object);
 
   // It finds the RequestContext for the given |sequence_number| and notifies
   // the RequestContext's |callback_object_| about the |value|. This is called
   // whenever we receive profiler data from processes. It also records that we
@@ skipping 18 matching lines @@
   // last_used_sequence_number_ is the most recently used number (used to avoid
   // reuse for a long time).
   int last_used_sequence_number_;
 
   DISALLOW_COPY_AND_ASSIGN(TrackingSynchronizer);
 };
 
 }  // namespace chrome_browser_metrics
 
 #endif  // CHROME_BROWSER_METRICS_TRACKING_SYNCHRONIZER_H_