Correct const accessors in base/values.(h|cc)

chrome/test/webdriver/commands/response.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 "chrome/test/webdriver/commands/response.h"
 
 #include "base/base64.h"
 #include "base/json/json_writer.h"
 #include "base/logging.h"
 #include "base/values.h"
@@ skipping 25 matching lines @@
   if (!data_.GetInteger(kStatusKey, &status))
     NOTREACHED();
   return static_cast<ErrorCode>(status);
 }
 
 void Response::SetStatus(ErrorCode status) {
   data_.SetInteger(kStatusKey, status);
 }
 
 const Value* Response::GetValue() const {
-  Value* out = NULL;
+  const Value* out = NULL;
   data_.Get(kValueKey, &out);
   return out;
 }
 
 void Response::SetValue(Value* value) {
   data_.Set(kValueKey, value);
 }
 
 void Response::SetError(Error* error) {
   DictionaryValue* error_dict = new DictionaryValue();
@@ skipping 17 matching lines @@
   // The |Value| classes do not support int64 and in rare cases we need to
   // return one. We do this by using a double and passing in the special
   // option so that the JSONWriter doesn't add '.0' to the end and confuse
   // the WebDriver client.
   base::JSONWriter::WriteWithOptions(
       &data_, base::JSONWriter::OPTIONS_OMIT_DOUBLE_TYPE_PRESERVATION, &json);
   return json;
 }
 
 }  // namespace webdriver