[Isolates] Cleanup of codepaths slowing down Dromaeo in browser.

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 7b954983af19a451f4a6d26710e81dca89c3d246..72a497d331485a6e078d50fc524a9dd531ffa060 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -436,7 +436,8 @@ class V8EXPORT HandleScope {
   /**
    * Creates a new handle with the given value.
    */
-  static internal::Object** CreateHandle(internal::Object* value);
+  template <class T>
+  static internal::Object** CreateHandle(T* value);
 
  private:
   // Make it impossible to create heap-allocated or illegal handle
@@ -3499,8 +3500,7 @@ Local<T>::Local() : Handle<T>() { }
 template <class T>
 Local<T> Local<T>::New(Handle<T> that) {
   if (that.IsEmpty()) return Local<T>();
-  internal::Object** p = reinterpret_cast<internal::Object**>(*that);
-  return Local<T>(reinterpret_cast<T*>(HandleScope::CreateHandle(*p)));
+  return Local<T>(reinterpret_cast<T*>(HandleScope::CreateHandle(*that)));
 }
 
 
@@ -3647,7 +3647,7 @@ Local<Value> Object::UncheckedGetInternalField(int index) {
     // value directly.
     int offset = I::kJSObjectHeaderSize + (internal::kPointerSize * index);
     O* value = I::ReadField<O*>(obj, offset);
-    O** result = HandleScope::CreateHandle(value);
+    O** result = HandleScope::CreateHandle(reinterpret_cast<Value*>(&value));
     return Local<Value>(reinterpret_cast<Value*>(result));
   } else {
     return Local<Value>();