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

chrome/test/webdriver/commands/html5_location_commands.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/html5_location_commands.h"
 
 #include "base/values.h"
 #include "chrome/test/webdriver/commands/response.h"
 #include "chrome/test/webdriver/webdriver_error.h"
 #include "chrome/test/webdriver/webdriver_session.h"
 
 namespace webdriver {
 
 HTML5LocationCommand::HTML5LocationCommand(
     const std::vector<std::string>& path_segments,
-    const base::DictionaryValue* const parameters)
+    base::DictionaryValue* const parameters)
     : WebDriverCommand(path_segments, parameters) {}
 
 HTML5LocationCommand::~HTML5LocationCommand() {}
 
 bool HTML5LocationCommand::DoesGet() {
   return true;
 }
 
 bool HTML5LocationCommand::DoesPost() {
   return true;
@@ skipping 15 matching lines @@
     response->SetError(new Error(
         kBadRequest, "Missing or invalid 'location'"));
     return;
   }
   Error* error = session_->OverrideGeolocation(geolocation);
   if (error)
     response->SetError(error);
 }
 
 }  // namespace webdriver