Move base/values.h into the base namespace.

base/values.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.
 
 // This file specifies a recursive data storage class called Value intended for
 // storing setting and other persistable data.  It includes the ability to
 // specify (recursive) lists and dictionaries, so it's fairly expressive.
 // However, the API is optimized for the common case, namely storing a
 // hierarchical tree of simple values.  Given a DictionaryValue root, you can
 // easily do things like:
@@ skipping 14 matching lines @@
 #include <iterator>
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/base_api.h"
 #include "base/basictypes.h"
 #include "base/string16.h"
 #include "build/build_config.h"
 
+// This file declares "using base::Value", etc. at the bottom, so that
+// current code can use these classes without the base namespace. In
+// new code, please always use base::Value, etc. or add your own
+// "using" declaration.
+// http://crbug.com/88666
+namespace base {
+
 class BinaryValue;
 class DictionaryValue;
 class FundamentalValue;
 class ListValue;
 class StringValue;
 class Value;
 
 typedef std::vector<Value*> ValueVector;
 typedef std::map<std::string, Value*> ValueMap;
 
@@ skipping 401 matching lines @@
 
   // This method deserializes the subclass-specific format into a Value object.
   // If the return value is non-NULL, the caller takes ownership of returned
   // Value. If the return value is NULL, and if error_code is non-NULL,
   // error_code will be set with the underlying error.
   // If |error_message| is non-null, it will be filled in with a formatted
   // error message including the location of the error if appropriate.
   virtual Value* Deserialize(int* error_code, std::string* error_str) = 0;
 };
 
+}  // namespace base
+
+// http://crbug.com/88666
+using base::BinaryValue;
+using base::DictionaryValue;
+using base::FundamentalValue;
+using base::ListValue;
+using base::StringValue;
+using base::Value;
+using base::ValueMap;
+using base::ValueSerializer;
+using base::ValueVector;
+
 #endif  // BASE_VALUES_H_