Revert 222102 "Remove unsafe access hacks from ScopedPersistent."

trunk/src/chrome/renderer/extensions/scoped_persistent.h

Index: trunk/src/chrome/renderer/extensions/scoped_persistent.h
===================================================================
--- trunk/src/chrome/renderer/extensions/scoped_persistent.h	(revision 222150)
+++ trunk/src/chrome/renderer/extensions/scoped_persistent.h	(working copy)
@@ -40,22 +40,23 @@
     handle_.Clear();
   }
 
-  bool IsEmpty() const {
-    return handle_.IsEmpty();
+  v8::Handle<T> operator->() const {
+    return get();
   }
 
+  // TODO(dcarney): Remove this function
+  // This is an unsafe access to the underlying handle
+  v8::Handle<T> get() const {
+    return *reinterpret_cast<v8::Handle<T>*>(
+      const_cast<v8::Persistent<T>* >(&handle_));
+  }
+
   v8::Handle<T> NewHandle() const {
     if (handle_.IsEmpty())
       return v8::Local<T>();
     return v8::Local<T>::New(GetIsolate(handle_), handle_);
   }
 
-  v8::Handle<T> NewHandle(v8::Isolate* isolate) const {
-    if (handle_.IsEmpty())
-      return v8::Local<T>();
-    return v8::Local<T>::New(isolate, handle_);
-  }
-
   template<typename P>
   void MakeWeak(P* parameters,
                 typename v8::WeakReferenceCallbacks<T, P>::Revivable callback) {