Record Chrome trace events in tcmalloc heap profiles

content/renderer/render_thread_impl.cc

Index: content/renderer/render_thread_impl.cc
diff --git a/content/renderer/render_thread_impl.cc b/content/renderer/render_thread_impl.cc
index aaf2b41f45f5b433484af6ed212f4425bf20b37d..16f5addda49fa551313dbd004ff8bb499d600a61 100644
--- a/content/renderer/render_thread_impl.cc
+++ b/content/renderer/render_thread_impl.cc
@@ -390,6 +390,8 @@ void RenderThreadImpl::Init() {
 #if defined(USE_TCMALLOC) && (defined(OS_LINUX) || defined(OS_ANDROID))
   if (command_line.HasSwitch(switches::kEnableMemoryBenchmarking))
     RegisterExtension(MemoryBenchmarkingExtension::Get());
+  trace_memory_controller_.reset(new base::debug::TraceMemoryController(
+      GetMessageLoop()->message_loop_proxy()));
 #endif  // USE_TCMALLOC
 
   if (command_line.HasSwitch(switches::kEnableSkiaBenchmarking)) {
@@ -426,6 +428,10 @@ void RenderThreadImpl::Shutdown() {
     devtools_agent_message_filter_ = NULL;
   }
 
+#if defined(USE_TCMALLOC) && (defined(OS_LINUX) || defined(OS_ANDROID))
+  trace_memory_controller_.reset();
+#endif
+
   RemoveFilter(audio_input_message_filter_.get());
   audio_input_message_filter_ = NULL;