Remove unsafe access hacks from ScopedPersistent.

chrome/renderer/extensions/chrome_v8_context.h

 // 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.
 
 #ifndef CHROME_RENDERER_EXTENSIONS_CHROME_V8_CONTEXT_H_
 #define CHROME_RENDERER_EXTENSIONS_CHROME_V8_CONTEXT_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 25 matching lines @@
                   Feature::Context context_type);
   virtual ~ChromeV8Context();
 
   // Clears the WebFrame for this contexts and invalidates the associated
   // ModuleSystem.
   void Invalidate();
 
   // Returns true if this context is still valid, false if it isn't.
   // A context becomes invalid via Invalidate().
   bool is_valid() const {
-    return !v8_context_.get().IsEmpty();
+    return !v8_context_.IsEmpty();
   }
 
   v8::Handle<v8::Context> v8_context() const {
-    return v8_context_.get();
+    return v8_context_.NewHandle(v8::Isolate::GetCurrent());
   }
 
   const Extension* extension() const {
     return extension_.get();
   }
 
   WebKit::WebFrame* web_frame() const {
     return web_frame_;
   }
 
@@ skipping 81 matching lines @@
   SafeBuiltins safe_builtins_;
 
   v8::Isolate* isolate_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeV8Context);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_RENDERER_EXTENSIONS_CHROME_V8_CONTEXT_H_