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

chrome/test/webdriver/webdriver_automation.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/webdriver_automation.h"
 
 #if defined(OS_WIN)
 #include <windows.h>
 #endif
 
@@ skipping 1092 matching lines @@
     return;
 
   if (geolocation_.get()) {
     geolocation->reset(geolocation_->DeepCopy());
   } else {
     *error = new Error(kUnknownError,
                        "Location must be set before it can be retrieved");
   }
 }
 
-void Automation::OverrideGeolocation(DictionaryValue* geolocation,
+void Automation::OverrideGeolocation(const DictionaryValue* geolocation,
                                      Error** error) {
   *error = CheckGeolocationSupported();
   if (*error)
     return;
 
   automation::Error auto_error;
   if (SendOverrideGeolocationJSONRequest(
           automation(), geolocation, &auto_error)) {
     geolocation_.reset(geolocation->DeepCopy());
   } else {
@@ skipping 68 matching lines @@
 }
 
 Error* Automation::CheckMaximizeSupported() {
   const char* message =
       "Maximize automation interface is not supported for this version of "
       "Chrome.";
   return CheckVersion(1160, message);
 }
 
 }  // namespace webdriver