Fix out-of-memory crashes related to ArrayBuffer allocation

third_party/WebKit/Source/modules/canvas2d/CanvasRenderingContext2D.idl

 /*
  * Copyright (C) 2006 Apple Computer, 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 98 matching lines @@
     [RaisesException] void drawImage(CanvasImageSource image, unrestricted float x, unrestricted float y);
     [RaisesException] void drawImage(CanvasImageSource image, unrestricted float x, unrestricted float y, unrestricted float width, unrestricted float height);
     [RaisesException] void drawImage(CanvasImageSource image, unrestricted float sx, unrestricted float sy, unrestricted float sw, unrestricted float sh, unrestricted float dx, unrestricted float dy, unrestricted float dw, unrestricted float dh);
 
     // hit regions
     [RuntimeEnabled=ExperimentalCanvasFeatures, RaisesException] void addHitRegion(optional HitRegionOptions options);
     [RuntimeEnabled=ExperimentalCanvasFeatures] void removeHitRegion(DOMString id);
     [RuntimeEnabled=ExperimentalCanvasFeatures] void clearHitRegions();
 
     // pixel manipulation
-    ImageData createImageData(ImageData imagedata);
+    [RaisesException] ImageData createImageData(ImageData imagedata);
     [RaisesException] ImageData createImageData(float sw, float sh);
     [RaisesException] ImageData getImageData(float sx, float sy, float sw, float sh);
     void putImageData(ImageData imagedata, float dx, float dy);
     void putImageData(ImageData imagedata, float dx, float dy, float dirtyX, float dirtyY, float dirtyWidth, float dirtyHeight);
 
     // Context state
     // Should be merged with WebGL counterpart in CanvasRenderingContext, once no-longer experimental
     [RuntimeEnabled=ExperimentalCanvasFeatures] boolean isContextLost();
 
     Canvas2DContextAttributes getContextAttributes();
@@ skipping 12 matching lines @@
 
     // text
     attribute DOMString font; // (default 10px sans-serif)
     attribute DOMString textAlign; // "start", "end", "left", "right", "center" (default: "start")
     attribute DOMString textBaseline; // "top", "hanging", "middle", "alphabetic", "ideographic", "bottom" (default: "alphabetic")
     [RuntimeEnabled=ExperimentalCanvasFeatures] attribute DOMString direction; // "inherit", "rtl", "ltr" (default: "inherit")
 
 };
 
 CanvasRenderingContext2D implements CanvasPathMethods;