Use a direct include of strings headers in content/renderer and content/shell.

content/renderer/render_view_impl_params.h

 // 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.
 
 #ifndef CONTENT_RENDERER_RENDER_VIEW_IMPL_PARAMS_H_
 #define CONTENT_RENDERER_RENDER_VIEW_IMPL_PARAMS_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
-#include "base/string16.h"
+#include "base/strings/string16.h"
 #include "content/common/content_export.h"
 #include "content/common/view_message_enums.h"
 
 struct WebPreferences;
 
 namespace WebKit {
 struct WebScreenInfo;
 }
 
 namespace content {
@@ skipping 33 matching lines @@
   bool swapped_out;
   int32 next_page_id;
   const WebKit::WebScreenInfo& screen_info;
   AccessibilityMode accessibility_mode;
   bool allow_partial_swap;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_VIEW_IMPL_PARAMS_H_