Minor clean up in transferToImageBitmap API

third_party/WebKit/Source/core/offscreencanvas/OffscreenCanvas.cpp

 // Copyright 2015 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 "core/offscreencanvas/OffscreenCanvas.h"
 
 #include "core/dom/ExceptionCode.h"
 #include "core/html/canvas/CanvasContextCreationAttributes.h"
 #include "core/html/canvas/CanvasRenderingContext.h"
 #include "core/html/canvas/CanvasRenderingContextFactory.h"
@@ skipping 53 matching lines @@
         InvalidStateError,
         "Cannot transfer an ImageBitmap from a detached OffscreenCanvas");
     return nullptr;
   }
   if (!m_context) {
     exceptionState.throwDOMException(InvalidStateError,
                                      "Cannot transfer an ImageBitmap from an "
                                      "OffscreenCanvas with no context");
     return nullptr;
   }
-  ImageBitmap* image = m_context->transferToImageBitmap(exceptionState);
+  ImageBitmap* image = m_context->transferToImageBitmap();
   if (!image) {
     // Undocumented exception (not in spec)
     exceptionState.throwDOMException(V8Error, "Out of memory");
   }
   return image;
 }
 
 PassRefPtr<Image> OffscreenCanvas::getSourceImageForCanvas(
     SourceImageStatus* status,
     AccelerationHint hint,
@@ skipping 96 matching lines @@
         m_clientId, m_sinkId, m_localId, m_nonce, width(), height()));
   }
   return m_frameDispatcher.get();
 }
 
 DEFINE_TRACE(OffscreenCanvas) {
   visitor->trace(m_context);
 }
 
 }  // namespace blink