Reduce header dependencies.

chrome/browser/browser_main.cc

 // Copyright (c) 2006-2008 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 <windows.h>
 #include <shellapi.h>
 
 #include <algorithm>
 
 #include "base/command_line.h"
 #include "base/file_util.h"
 #include "base/gfx/vector_canvas.h"
 #include "base/histogram.h"
 #include "base/path_service.h"
+#include "base/process_util.h"
 #include "base/registry.h"
 #include "base/string_util.h"
 #include "base/tracked_objects.h"
 #include "base/win_util.h"
 #include "chrome/app/result_codes.h"
 #include "chrome/browser/automation/automation_provider.h"
 #include "chrome/browser/browser.h"
 #include "chrome/browser/browser_init.h"
 #include "chrome/browser/browser_list.h"
 #include "chrome/browser/browser_prefs.h"
@@ skipping 573 matching lines @@
   // unsafe to do this cleanup if other threads are still active.
   // It is also very unnecessary, so I'm only doing this in debug to satisfy
   // purify.
   if (tracking_objects)
     tracked_objects::ThreadData::ShutdownSingleThreadedCleanup();
 #endif  // NDEBUG
 
   return result_code;
 }