Added histograms to track duration when StartupTimeBomb goes off.

chrome/browser/metrics/thread_watcher.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/metrics/thread_watcher.h"
 
 #include <math.h>  // ceil
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ skipping 892 matching lines @@
   // without crashing and in debug mode we break into the debugger.
   virtual void Alarm() OVERRIDE {
 #if !defined(NDEBUG)
     StartupCrash();
     return;
 #elif !defined(OS_ANDROID)
     WatchDogThread::PostTask(FROM_HERE, base::Bind(&StartupCrash));
     return;
 #else  // Android release: gather stats to figure out when to crash.
     // TODO(rtenneti): Delete this code, after getting data.
-    UMA_HISTOGRAM_TIMES("StartupTimebomm.Alarm.TimeDuration",
+    UMA_HISTOGRAM_TIMES("StartupTimeBomb.Alarm.TimeDuration",
                         base::Time::Now() - start_time_clock_);
-    UMA_HISTOGRAM_TIMES("StartupTimebomm.Alarm.TimeTicksDuration",
+    UMA_HISTOGRAM_TIMES("StartupTimeBomb.Alarm.TimeTicksDuration",
                         base::TimeTicks::Now() - start_time_monotonic_);
     if (base::TimeTicks::IsThreadNowSupported()) {
       UMA_HISTOGRAM_TIMES(
-          "StartupTimebomm.Alarm.ThreadNowDuration",
+          "StartupTimeBomb.Alarm.ThreadNowDuration",
           base::TimeTicks::ThreadNow() - start_time_thread_now_);
     }
     return;
 #endif  // OS_ANDROID
   }
 
  private:
 #if defined(OS_ANDROID)
   // TODO(rtenneti): Delete this code, after getting data.
   base::Time start_time_clock_;
@@ skipping 120 matching lines @@
 
 #if defined(OS_WIN)
   // On Windows XP, give twice the time for shutdown.
   if (base::win::GetVersion() <= base::win::VERSION_XP)
     actual_duration *= 2;
 #endif
 
   shutdown_watchdog_ = new ShutdownWatchDogThread(actual_duration);
   shutdown_watchdog_->Arm();
 }