Remove usage of deprecated V8 APIs from c/r/extensions

chrome/renderer/extensions/unsafe_persistent.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 CHROME_RENDERER_EXTENSIONS_UNSAFE_PERSISTENT_H_
 #define CHROME_RENDERER_EXTENSIONS_UNSAFE_PERSISTENT_H_
 
 #include "v8/include/v8.h"
 
 namespace extensions {
@@ skipping 13 matching lines @@
 
   UnsafePersistent(v8::Isolate* isolate, const v8::Handle<T>& handle) {
     v8::Persistent<T> persistent(isolate, handle);
     value_ = persistent.ClearAndLeak();
   }
 
   // Usage of this function requires
   // V8_ALLOW_ACCESS_TO_RAW_HANDLE_CONSTRUCTOR to be defined
   void dispose() {
     v8::Persistent<T> handle(value_);
-    handle.Dispose();
+    handle.Reset();
     value_ = 0;
   }
 
   // Usage of this function requires
   // V8_ALLOW_ACCESS_TO_RAW_HANDLE_CONSTRUCTOR to be defined
   v8::Local<T> newLocal(v8::Isolate* isolate) {
     return v8::Local<T>::New(isolate, v8::Local<T>(value_));
   }
 
  private:
   T* value_;
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_RENDERER_EXTENSIONS_UNSAFE_PERSISTENT_H_