Make base::Value::TYPE a scoped enum.

ios/web/public/web_state/web_state.h

 // Copyright 2013 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 IOS_WEB_PUBLIC_WEB_STATE_WEB_STATE_H_
 #define IOS_WEB_PUBLIC_WEB_STATE_WEB_STATE_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 123 matching lines @@
   // null.
   virtual const NavigationManager* GetNavigationManager() const = 0;
   virtual NavigationManager* GetNavigationManager() = 0;
 
   // Gets the CRWJSInjectionReceiver associated with this WebState.
   virtual CRWJSInjectionReceiver* GetJSInjectionReceiver() const = 0;
 
   // Runs JavaScript in the main frame's context. If a callback is provided, it
   // will be used to return the result, when the result is available or script
   // execution has failed due to an error.
-  // NOTE: Integer values will be returned as TYPE_DOUBLE because of underlying
+  // NOTE: Integer values will be returned as Type::DOUBLE because of underlying
   // library limitation.
   typedef base::Callback<void(const base::Value*)> JavaScriptResultCallback;
   virtual void ExecuteJavaScript(const base::string16& javascript) = 0;
   virtual void ExecuteJavaScript(const base::string16& javascript,
                                  const JavaScriptResultCallback& callback) = 0;
 
   // Gets the contents MIME type.
   virtual const std::string& GetContentsMimeType() const = 0;
 
   // Gets the value of the "Content-Language" HTTP header.
@@ skipping 113 matching lines @@
 
   // Returns a WeakPtr<WebState> to the current WebState. Must remain private
   // and only call must be in WebStateWeakPtrFactory. Please consult that class
   // for more details. Remove as part of http://crbug.com/556736.
   virtual base::WeakPtr<WebState> AsWeakPtr() = 0;
 };
 
 }  // namespace web
 
 #endif  // IOS_WEB_PUBLIC_WEB_STATE_WEB_STATE_H_