Revert of Increase ThreadWatcher unresponsive threashold to 72 secs in dev

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 516 matching lines @@
   DCHECK(this == g_thread_watcher_list_);
   g_thread_watcher_list_ = NULL;
 }
 
 // static
 void ThreadWatcherList::ParseCommandLine(
     const CommandLine& command_line,
     uint32* unresponsive_threshold,
     CrashOnHangThreadMap* crash_on_hang_threads) {
   // Initialize |unresponsive_threshold| to a default value.
-  // TODO(rtenneti): Changed the default value to 4 times, until we can triage
-  // hangs automatically (and to reduce the crash dumps).
-  *unresponsive_threshold = kUnresponsiveCount * 4;
+  *unresponsive_threshold = kUnresponsiveCount;
 
   // Increase the unresponsive_threshold on the Stable and Beta channels to
   // reduce the number of crashes due to ThreadWatcher.
   chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel();
   if (channel == chrome::VersionInfo::CHANNEL_STABLE) {
     *unresponsive_threshold *= 4;
   } else if (channel == chrome::VersionInfo::CHANNEL_BETA) {
     *unresponsive_threshold *= 2;
   }
 
@@ skipping 527 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();
 }