Revert of Profiler-instrumentation of the startup time

content/browser/browser_main_runner.cc

Index: content/browser/browser_main_runner.cc
diff --git a/content/browser/browser_main_runner.cc b/content/browser/browser_main_runner.cc
index 3c106759d07083863e412a473fed4ecf0d7a2417..b12ccd6da25c855ea0f831d2373e63d9ff04261f 100644
--- a/content/browser/browser_main_runner.cc
+++ b/content/browser/browser_main_runner.cc
@@ -10,9 +10,7 @@
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/metrics/statistics_recorder.h"
-#include "base/profiler/scoped_tracker.h"
 #include "base/trace_event/trace_event.h"
-#include "base/tracked_objects.h"
 #include "content/browser/browser_main_loop.h"
 #include "content/browser/browser_shutdown_profile_dumper.h"
 #include "content/browser/notification_service_impl.h"
@@ -128,13 +126,6 @@
   }
 
   int Initialize(const MainFunctionParams& parameters) override {
-    // TODO(vadimt): Remove all tracked_objects references below once
-    // crbug.com/453640 is fixed.
-    tracked_objects::ThreadData::InitializeThreadContext("CrBrowserMain");
-
-    tracked_objects::ScopedTracker tracking_profile(
-        FROM_HERE_WITH_EXPLICIT_FUNCTION("BrowserMainRunnerImpl::Initialize"));
-
     TRACE_EVENT0("startup", "BrowserMainRunnerImpl::Initialize");
     // On Android we normally initialize the browser in a series of UI thread
     // tasks. While this is happening a second request can come from the OS or