Record Chrome trace events in tcmalloc heap profiles

content/renderer/renderer_main_platform_delegate_linux.cc

Index: content/renderer/renderer_main_platform_delegate_linux.cc
diff --git a/content/renderer/renderer_main_platform_delegate_linux.cc b/content/renderer/renderer_main_platform_delegate_linux.cc
index 52b0ea245631c44e9df2439517f61b7e72f970d5..57845cf7797ae7cbbfc0d3c493e36180ae08a4a7 100644
--- a/content/renderer/renderer_main_platform_delegate_linux.cc
+++ b/content/renderer/renderer_main_platform_delegate_linux.cc
@@ -8,8 +8,10 @@
 #include <sys/stat.h>
 
 #include "base/command_line.h"
+#include "base/debug/trace_memory.h"
 #include "base/file_util.h"
 #include "base/logging.h"
+#include "base/message_loop.h"
 #include "content/common/sandbox_linux.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/sandbox_init.h"
@@ -34,9 +36,14 @@ void RendererMainPlatformDelegate::PlatformInitialize() {
   if (command_line.HasSwitch(switches::kEnableVtune))
     vTune::InitializeVtuneForV8();
 #endif
+
+  // TODO(jamescook): Only start this when tracing is flipped on.
+  base::TraceMemoryStart();
+
 }
 
 void RendererMainPlatformDelegate::PlatformUninitialize() {
+  base::TraceMemoryStop();
 }
 
 bool RendererMainPlatformDelegate::InitSandboxTests(bool no_sandbox) {