Propogate status setting for profiler to track parents

[Reland: https://src.chromium.org/viewvc/chrome?view=rev&revision=120789
with minor change to avoid race on status change.]

This allows child processes to track ancestry, and report
it to the browser process.

Parent tracking is only turned on based on an 
environment variable.

r=rtenneti
Review URL: https://chromiumcodereview.appspot.com/9363007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@121491 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 6 insertions, 4 deletions

diff --git a/base/tracked_objects.h b/base/tracked_objects.h
index 9b7f111..c0674cc 100644
--- a/base/tracked_objects.h
+++ b/base/tracked_objects.h
@@ -442,15 +442,17 @@ class BASE_EXPORT ThreadData {
   // PROFILING_ACTIVE (i.e., it can't be set to a higher level than what is
   // compiled into the binary, and parent-child tracking at the
   // PROFILING_CHILDREN_ACTIVE level might not be compiled in).
-  static bool InitializeAndSetTrackingStatus(bool status);
+  static bool InitializeAndSetTrackingStatus(Status status);
+
+  static Status status();
 
   // Indicate if any sort of profiling is being done (i.e., we are more than
   // DEACTIVATED).
-  static bool tracking_status();
+  static bool TrackingStatus();
 
   // For testing only, indicate if the status of parent-child tracking is turned
-  // on.  This is currently a compiled option, atop tracking_status().
-  static bool tracking_parent_child_status();
+  // on.  This is currently a compiled option, atop TrackingStatus().
+  static bool TrackingParentChildStatus();
 
   // Special versions of Now() for getting times at start and end of a tracked
   // run.  They are super fast when tracking is disabled, and have some internal