Show gpu process stats in about:tcmalloc

chrome/browser/metrics/tracking_synchronizer.h

Index: chrome/browser/metrics/tracking_synchronizer.h
diff --git a/chrome/browser/metrics/tracking_synchronizer.h b/chrome/browser/metrics/tracking_synchronizer.h
index e30f82389604b492096b1500a01ad116bce5b041..b62a682609b8803b972cf08c4ea5f9017b8eb8d3 100644
--- a/chrome/browser/metrics/tracking_synchronizer.h
+++ b/chrome/browser/metrics/tracking_synchronizer.h
@@ -78,6 +78,13 @@ class TrackingSynchronizer
       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