Add some instrumentation to BrowserProcessImpl.

chrome/browser/browser_process_impl.h

 // 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.
 
 // When each service is created, we set a flag indicating this. At this point,
 // the service initialization could fail or succeed. This allows us to remember
 // if we tried to create a service, and not try creating it over and over if
 // the creation failed.
 
 #ifndef CHROME_BROWSER_BROWSER_PROCESS_IMPL_H_
 #define CHROME_BROWSER_BROWSER_PROCESS_IMPL_H_
 #pragma once
 
 #include <string>
 
 #include "base/basictypes.h"
+#include "base/debug/stack_trace.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/message_loop.h"
 #include "base/threading/non_thread_safe.h"
 #include "base/timer.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/prefs/pref_change_registrar.h"
 #include "chrome/browser/prefs/pref_member.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
@@ skipping 238 matching lines @@
   scoped_ptr<BrowserOnlineStateObserver> online_state_observer_;
 
 #if !defined(OS_CHROMEOS)
   scoped_ptr<ComponentUpdateService> component_updater_;
 
   scoped_refptr<CRLSetFetcher> crl_set_fetcher_;
 #endif
 
   scoped_refptr<AudioManager> audio_manager_;
 
+  // TODO(eroman): Remove this when done debugging 113031. This tracks
+  // the callstack which released the final module reference count.
+  base::debug::StackTrace release_last_reference_callstack_;
+
   DISALLOW_COPY_AND_ASSIGN(BrowserProcessImpl);
 };
 
 #endif  // CHROME_BROWSER_BROWSER_PROCESS_IMPL_H_