Move base/values.h into the base namespace.

printing/backend/print_backend.h

 // Copyright (c) 2011 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 PRINTING_BACKEND_PRINT_BACKEND_H_
 #define PRINTING_BACKEND_PRINT_BACKEND_H_
 #pragma once
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 
+namespace base {
 class DictionaryValue;
+}
 
 // This is the interface for platform-specific code for a print backend
 namespace printing {
 
 struct PrinterBasicInfo {
   PrinterBasicInfo();
   ~PrinterBasicInfo();
 
   std::string printer_name;
   std::string printer_description;
@@ skipping 36 matching lines @@
       const std::string& printer_name,
       PrinterCapsAndDefaults* printer_info) = 0;
 
   // Returns true if printer_name points to a valid printer.
   virtual bool IsValidPrinter(const std::string& printer_name) = 0;
 
   // Allocate a print backend. If |print_backend_settings| is NULL, default
   // settings will be used.
   // Return NULL if no print backend available.
   static scoped_refptr<PrintBackend> CreateInstance(
-      const DictionaryValue* print_backend_settings);
+      const base::DictionaryValue* print_backend_settings);
 };
 
 }  // namespace printing
 
 #endif  // PRINTING_BACKEND_PRINT_BACKEND_H_