Instantiate instance templates instead of doing construct calls

third_party/WebKit/Source/bindings/core/v8/V8DOMWrapper.cpp

 /*
  * Copyright (C) 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 66 matching lines @@
     // cross-origin script access to a few properties of Location is allowed.
     // Location already implements the necessary security checks.
     bool withSecurityCheck = !type->equals(&V8Location::wrapperTypeInfo);
     V8WrapperInstantiationScope scope(creationContext, isolate, withSecurityCheck);
 
     V8PerContextData* perContextData = V8PerContextData::from(scope.context());
     v8::Local<v8::Object> wrapper;
     if (perContextData) {
         wrapper = perContextData->createWrapperFromCache(type);
     } else {
-        v8::Local<v8::Function> function;
-        if (!type->domTemplate(isolate)->GetFunction(isolate->GetCurrentContext()).ToLocal(&function))
-            return v8::Local<v8::Object>();
-        if (!V8ObjectConstructor::newInstance(isolate, function).ToLocal(&wrapper))
+        if (!type->domTemplate(isolate)->InstanceTemplate()->NewInstance(scope.context()).ToLocal(&wrapper))
             return v8::Local<v8::Object>();
     }
 
     if (type == &V8HTMLDocument::wrapperTypeInfo && !wrapper.IsEmpty())
         wrapper = wrapInShadowTemplate(wrapper, scriptWrappable, isolate);
 
     return wrapper;
 }
 
 bool V8DOMWrapper::isWrapper(v8::Isolate* isolate, v8::Local<v8::Value> value)
@@ skipping 49 matching lines @@
     v8::Isolate* isolate = m_context->GetIsolate();
     // TODO(jochen): Currently, Location is the only object for which we can reach this code path. Should be generalized.
     ExceptionState exceptionState(ExceptionState::ConstructionContext, "Location", isolate->GetCurrentContext()->Global(), isolate);
     LocalDOMWindow* callingWindow = callingDOMWindow(isolate);
     DOMWindow* targetWindow = toDOMWindow(m_context);
     exceptionState.throwSecurityError(targetWindow->sanitizedCrossDomainAccessErrorMessage(callingWindow), targetWindow->crossDomainAccessErrorMessage(callingWindow));
     exceptionState.throwIfNeeded();
 }
 
 } // namespace blink