Revert 133773 - [UMA] Add performance profile data to UMA uploads.

BUG=103480
TEST=unit_test --gtest_filter=MetricsLogTest.*


Review URL: http://codereview.chromium.org/9702015

TBR=isherman@chromium.org
Review URL: https://chromiumcodereview.appspot.com/10169039

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@133779 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 15 insertions, 3 deletions

diff --git a/base/tracked_objects.cc b/base/tracked_objects.cc
index ae508c4..fe3f712 100644
--- a/base/tracked_objects.cc
+++ b/base/tracked_objects.cc
@@ -648,9 +648,21 @@ void ThreadData::Reset() {
 }
 
 static void OptionallyInitializeAlternateTimer() {
-  NowFunction* alternate_time_source = GetAlternateTimeSource();
-  if (alternate_time_source)
-    ThreadData::SetAlternateTimeSource(alternate_time_source);
+  char* alternate_selector = getenv(kAlternateProfilerTime);
+  if (!alternate_selector)
+    return;
+  switch (*alternate_selector) {
+    case '0':  // This is the default value, and uses the wall clock time.
+      break;
+    case '1':  {
+      // Use the TCMalloc allocations-on-thread as a pseudo-time.
+      ThreadData::SetAlternateTimeSource(GetAlternateTimeSource());
+      break;
+      }
+    default:
+      NOTREACHED();
+      break;
+  }
 }
 
 bool ThreadData::Initialize() {