binding: Retires ExceptionState::throwIfNeeded().

third_party/WebKit/Source/bindings/core/v8/custom/V8HTMLElementCustom.cpp

 // Copyright 2016 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.
 
 #include "bindings/core/v8/V8HTMLElement.h"
 
 #include "bindings/core/v8/DOMWrapperWorld.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptCustomElementDefinition.h"
 #include "bindings/core/v8/V8Binding.h"
@@ skipping 51 matching lines @@
         if (element) {
             // This is an element being upgraded that has called super
             definition->constructionStack().last().clear();
         } else {
             // During upgrade an element has invoked the same constructor
             // before calling 'super' and that invocation has poached the
             // element.
             exceptionState.throwDOMException(
                 InvalidStateError,
                 "this instance is already constructed");
-            exceptionState.throwIfNeeded();
             return;
         }
     }
     const WrapperTypeInfo* wrapperType = element->wrapperTypeInfo();
     v8::Local<v8::Object> wrapper = V8DOMWrapper::associateObjectWithWrapper(
         isolate,
         element,
         wrapperType,
         info.Holder());
     // If the element had a wrapper, we now update and return that
     // instead.
     v8SetReturnValue(info, wrapper);
 
     wrapper->SetPrototype(scriptState->context(), definition->prototype()).ToChecked();
 }
 
 } // namespace blink