Stop throwing DOM exceptions in internal 'XMLHttpRequest' response getters.

Source/bindings/v8/custom/V8XMLHttpRequestCustom.cpp

 /*
  * Copyright (C) 2008, 2009, 2010 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 84 matching lines @@
             ExceptionState es(info.GetIsolate());
             Document* document = xmlHttpRequest->responseXML(es);
             if (es.throwIfNeeded())
                 return;
             v8SetReturnValue(info, toV8Fast(document, info, xmlHttpRequest));
             return;
         }
 
     case XMLHttpRequest::ResponseTypeBlob:
         {
-            ExceptionState es(info.GetIsolate());
-            Blob* blob = xmlHttpRequest->responseBlob(es);
-            if (es.throwIfNeeded())
-                return;
+            Blob* blob = xmlHttpRequest->responseBlob();
             v8SetReturnValue(info, toV8Fast(blob, info, xmlHttpRequest));
             return;
         }
 
     case XMLHttpRequest::ResponseTypeArrayBuffer:
         {
-            ExceptionState es(info.GetIsolate());
-            ArrayBuffer* arrayBuffer = xmlHttpRequest->responseArrayBuffer(es);
-            if (es.throwIfNeeded())
-                return;
+            ArrayBuffer* arrayBuffer = xmlHttpRequest->responseArrayBuffer();
             if (arrayBuffer && !arrayBuffer->hasDeallocationObserver()) {
                 arrayBuffer->setDeallocationObserver(V8ArrayBufferDeallocationObserver::instance());
                 v8::V8::AdjustAmountOfExternalAllocatedMemory(arrayBuffer->byteLength());
             }
             v8SetReturnValue(info, toV8Fast(arrayBuffer, info, xmlHttpRequest));
             return;
         }
     }
 }
 
@@ skipping 88 matching lines @@
             ASSERT(arrayBufferView);
             xmlHttpRequest->send(arrayBufferView, es);
         } else
             xmlHttpRequest->send(toWebCoreStringWithNullCheck(arg), es);
     }
 
     es.throwIfNeeded();
 }
 
 } // namespace WebCore