binding: Retires ExceptionState::throwIfNeeded().

third_party/WebKit/Source/bindings/core/v8/custom/V8CustomEventCustom.cpp

 /*
  * Copyright (C) 2012 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 43 matching lines @@
     // when the getter of |detail| is called in the main world later.
     if (scriptState->world().isIsolatedWorld())
         impl->setSerializedDetail(SerializedScriptValue::serializeAndSwallowExceptions(scriptState->isolate(), detail));
 }
 
 void V8CustomEvent::constructorCustom(const v8::FunctionCallbackInfo<v8::Value>& info)
 {
     ExceptionState exceptionState(ExceptionState::ConstructionContext, "CustomEvent", info.Holder(), info.GetIsolate());
     if (UNLIKELY(info.Length() < 1)) {
         setMinimumArityTypeError(exceptionState, 1, info.Length());
-        exceptionState.throwIfNeeded();
         return;
     }
 
     V8StringResource<> type = info[0];
     if (!type.prepare())
         return;
 
     CustomEventInit eventInitDict;
     if (!isUndefinedOrNull(info[1])) {
         if (!info[1]->IsObject()) {
             exceptionState.throwTypeError("parameter 2 ('eventInitDict') is not an object.");
-            exceptionState.throwIfNeeded();
             return;
         }
         V8CustomEventInit::toImpl(info.GetIsolate(), info[1], eventInitDict, exceptionState);
-        if (exceptionState.throwIfNeeded())
+        if (exceptionState.hadException())
             return;
     }
 
     CustomEvent* impl = CustomEvent::create(type, eventInitDict);
     v8::Local<v8::Object> wrapper = info.Holder();
     wrapper = impl->associateWithWrapper(info.GetIsolate(), &V8CustomEvent::wrapperTypeInfo, wrapper);
 
     // TODO(bashi): Workaround for http://crbug.com/529941. We need to store
     // |detail| as a private property to avoid cycle references.
     if (eventInitDict.hasDetail()) {
@@ skipping 35 matching lines @@
     }
 
     // |detail| should be null when it is an empty handle because its default value is null.
     if (detail.IsEmpty())
         detail = v8::Null(info.GetIsolate());
     privateDetail.set(scriptState->context(), info.Holder(), detail);
     v8SetReturnValue(info, detail);
 }
 
 } // namespace blink