Use a direct include of strings headers in chrome/browser/a*-c*/.

chrome/browser/component_updater/widevine_cdm_component_installer.cc

 // Copyright (c) 2013 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/component_updater/widevine_cdm_component_installer.h"
 
 #include <string.h>
 
 #include <vector>
 
 #include "base/base_paths.h"
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/file_util.h"
 #include "base/files/file_enumerator.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/path_service.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "base/values.h"
 #include "base/version.h"
 #include "build/build_config.h"
 #include "chrome/browser/component_updater/component_updater_service.h"
 #include "chrome/browser/plugins/plugin_prefs.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/widevine_cdm_constants.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/plugin_service.h"
@@ skipping 272 matching lines @@
 #endif  // defined(WIDEVINE_CDM_AVAILABLE) && defined(WIDEVINE_CDM_IS_COMPONENT)
 
 }  // namespace
 
 void RegisterWidevineCdmComponent(ComponentUpdateService* cus) {
 #if defined(WIDEVINE_CDM_AVAILABLE) && defined(WIDEVINE_CDM_IS_COMPONENT)
   BrowserThread::PostTask(BrowserThread::FILE, FROM_HERE,
                           base::Bind(&StartWidevineCdmUpdateRegistration, cus));
 #endif  // defined(WIDEVINE_CDM_AVAILABLE) && defined(WIDEVINE_CDM_IS_COMPONENT)
 }