Use a direct include of strings headers in content/browser/, part 1.

content/browser/child_process_security_policy_impl.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 "content/browser/child_process_security_policy_impl.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/metrics/histogram.h"
 #include "base/platform_file.h"
 #include "base/stl_util.h"
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "content/browser/site_instance_impl.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/common/bindings_policy.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/url_constants.h"
 #include "googleurl/src/gurl.h"
 #include "net/base/net_util.h"
 #include "net/url_request/url_request.h"
 #include "webkit/browser/fileapi/isolated_context.h"
@@ skipping 662 matching lines @@
     int permission) {
   base::AutoLock lock(lock_);
 
   SecurityStateMap::iterator state = security_state_.find(child_id);
   if (state == security_state_.end())
     return false;
   return state->second->HasPermissionsForFileSystem(filesystem_id, permission);
 }
 
 }  // namespace content