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

content/browser/browser_url_handler_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/browser_url_handler_impl.h"
 
-#include "base/string_util.h"
+#include "base/strings/string_util.h"
 #include "content/browser/webui/web_ui_impl.h"
 #include "content/public/browser/content_browser_client.h"
 #include "content/public/common/url_constants.h"
 #include "googleurl/src/gurl.h"
 
 namespace content {
 
 // Handles rewriting view-source URLs for what we'll actually load.
 static bool HandleViewSource(GURL* url,
                              BrowserContext* browser_context) {
@@ skipping 108 matching lines @@
           return true;
       } else if (handler(&test_url, browser_context)) {
         return reverse_rewriter(url, browser_context);
       }
     }
   }
   return false;
 }
 
 }  // namespace content