Remove [TreatNullAs=NullString] from attributes on CanvasRenderingContext2D

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 40 matching lines @@
     [RuntimeEnabled=ExperimentalCanvasFeatures] attribute SVGMatrix currentTransform;
     void scale(unrestricted float x, unrestricted float y);
     void rotate(unrestricted float angle);
     void translate(unrestricted float x, unrestricted float y);
     void transform(unrestricted float a, unrestricted float b, unrestricted float c, unrestricted float d, unrestricted float e, unrestricted float f);
     void setTransform(unrestricted float a, unrestricted float b, unrestricted float c, unrestricted float d, unrestricted float e, unrestricted float f);
     void resetTransform();
 
     // compositing
     attribute unrestricted float globalAlpha; // (default 1.0)
-    [TreatNullAs=NullString] attribute DOMString globalCompositeOperation; // (default source-over)
+    attribute DOMString globalCompositeOperation; // (default source-over)
     [RuntimeEnabled=ExperimentalCanvasFeatures] attribute DOMString filter; // (default 'none') 
 
     // image smoothing
     [ImplementedAs=imageSmoothingEnabled, DeprecateAs=PrefixedImageSmoothingEnabled] attribute boolean webkitImageSmoothingEnabled;
     [MeasureAs=UnprefixedImageSmoothingEnabled] attribute boolean imageSmoothingEnabled; // (default True)
     [RuntimeEnabled=ExperimentalCanvasFeatures] attribute ImageSmoothingQuality imageSmoothingQuality; // (default "low")
 
     // colors and styles (see also the CanvasDrawingStyles interface)
     attribute (DOMString or CanvasGradient or CanvasPattern) strokeStyle; // (default black)
     attribute (DOMString or CanvasGradient or CanvasPattern) fillStyle; // (default black)
     CanvasGradient createLinearGradient(float x0, float y0, float x1, float y1);
     [RaisesException] CanvasGradient createRadialGradient(float x0, float y0, float r0, float x1, float y1, float r1);
     [RaisesException] CanvasPattern createPattern(CanvasImageSource image, DOMString? repetitionType);
 
     // shadows
     attribute unrestricted float shadowOffsetX;
     attribute unrestricted float shadowOffsetY;
     attribute unrestricted float shadowBlur;
-    [TreatNullAs=NullString] attribute DOMString shadowColor;
+    attribute DOMString shadowColor;
 
     // rects
     void clearRect(unrestricted float x, unrestricted float y, unrestricted float width, unrestricted float height);
     void fillRect(unrestricted float x, unrestricted float y, unrestricted float width, unrestricted float height);
     void strokeRect(unrestricted float x, unrestricted float y, unrestricted float width, unrestricted float height);
 
     // path API (see also CanvasPathMethods)
     void beginPath();
     void fill(optional CanvasFillRule winding);
     void fill(Path2D path, optional CanvasFillRule winding);
@@ skipping 35 matching lines @@
 
     // Context state
     // Should be merged with WebGL counterpart in CanvasRenderingContext, once no-longer experimental
     [RuntimeEnabled=ExperimentalCanvasFeatures] boolean isContextLost();
 
     Canvas2DContextAttributes getContextAttributes();
 
     // FIXME: factor out to CanvasDrawingStyles
     // line caps/joins
     attribute unrestricted float lineWidth; // (default 1)
-    [TreatNullAs=NullString] attribute DOMString lineCap; // "butt", "round", "square" (default "butt")
-    [TreatNullAs=NullString] attribute DOMString lineJoin; // "round", "bevel", "miter" (default "miter")
+    attribute DOMString lineCap; // "butt", "round", "square" (default "butt")
+    attribute DOMString lineJoin; // "round", "bevel", "miter" (default "miter")
     attribute unrestricted float miterLimit; // (default 10)
 
     // dashed lines
     void setLineDash(sequence<unrestricted float> dash);
     sequence<unrestricted float> getLineDash();
     attribute unrestricted float lineDashOffset;
 
     // 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;