Revert of Move DOMArrayBuffer, DOMArrayBufferViews and DataView to the heap.

third_party/WebKit/Source/modules/canvas2d/BaseRenderingContext2D.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 "modules/canvas2d/BaseRenderingContext2D.h"
 
 #include "bindings/core/v8/ExceptionMessages.h"
 #include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ExceptionStatePlaceholder.h"
 #include "core/css/parser/CSSParser.h"
@@ skipping 1192 matching lines @@
             exceptionState.throwRangeError("Out of memory at ImageData creation");
         return result;
     }
 
     WTF::ArrayBufferContents contents;
     if (!buffer->getImageData(Unmultiplied, imageDataRect, contents)) {
         exceptionState.throwRangeError("Out of memory at ImageData creation");
         return nullptr;
     }
 
-    DOMArrayBuffer* arrayBuffer = DOMArrayBuffer::create(contents);
+    RefPtr<DOMArrayBuffer> arrayBuffer = DOMArrayBuffer::create(contents);
     return ImageData::create(
         imageDataRect.size(),
         DOMUint8ClampedArray::create(arrayBuffer, 0, arrayBuffer->byteLength()));
 }
 
 void BaseRenderingContext2D::putImageData(ImageData* data, double dx, double dy, ExceptionState& exceptionState)
 {
     putImageData(data, dx, dy, 0, 0, data->width(), data->height(), exceptionState);
 }
 
@@ skipping 142 matching lines @@
 
     imageBuffer()->willOverwriteCanvas();
 }
 
 DEFINE_TRACE(BaseRenderingContext2D)
 {
     visitor->trace(m_stateStack);
 }
 
 } // namespace blink