base/ header cleanup. Forward declaration instead of including.

chrome/browser/browser_about_handler.cc

 // Copyright (c) 2010 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/browser_about_handler.h"
 
 #include <algorithm>
 #include <string>
 #include <vector>
 
 #include "app/l10n_util.h"
 #include "app/resource_bundle.h"
 #include "base/callback.h"
+#include "base/command_line.h"
 #include "base/file_version_info.h"
 #include "base/histogram.h"
 #include "base/i18n/number_formatting.h"
 #include "base/path_service.h"
 #include "base/platform_thread.h"
 #include "base/stats_table.h"
 #include "base/string_piece.h"
 #include "base/string_util.h"
 #include "base/thread.h"
 #include "base/tracked_objects.h"
@@ skipping 1144 matching lines @@
     // Run the dialog. This will re-use the existing one if it's already up.
     AboutIPCDialog::RunDialog();
     return true;
   }
 #endif
 
 #endif  // OFFICIAL_BUILD
 
   return false;
 }