Collect profiler stats from browser child processes.

content/browser/renderer_host/render_process_host_impl.cc

Index: content/browser/renderer_host/render_process_host_impl.cc
===================================================================
--- content/browser/renderer_host/render_process_host_impl.cc	(revision 110669)
+++ content/browser/renderer_host/render_process_host_impl.cc	(working copy)
@@ -32,6 +32,7 @@
 #include "base/sys_info.h"
 #include "base/threading/thread.h"
 #include "base/threading/thread_restrictions.h"
+#include "base/tracked_objects.h"
 #include "content/browser/appcache/appcache_dispatcher_host.h"
 #include "content/browser/browser_child_process_host.h"
 #include "content/browser/browser_context.h"
@@ -933,6 +934,9 @@
       IPC::Logging::GetInstance()->Enabled()));
 #endif
 
+  bool enable = tracked_objects::ThreadData::tracking_status();
+  Send(new ChildProcessMsg_SetProfilerStatus(enable));
+
   // Make sure the child checks with us before exiting, so that we do not try
   // to schedule a new navigation in a swapped out and exiting renderer.
   Send(new ChildProcessMsg_AskBeforeShutdown());