Use IDL union types for CanvasRenderingContext2D.{fill,stroke}Style

Source/core/html/canvas/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 45 matching lines @@
 
     // compositing
     attribute unrestricted float globalAlpha; // (default 1.0)
     [TreatNullAs=NullString] attribute DOMString globalCompositeOperation; // (default source-over)
 
     // image smoothing
     [ImplementedAs=imageSmoothingEnabled, MeasureAs=PrefixedImageSmoothingEnabled] attribute boolean webkitImageSmoothingEnabled;
     [MeasureAs=UnprefixedImageSmoothingEnabled] attribute boolean imageSmoothingEnabled;
 
     // colors and styles (see also the CanvasDrawingStyles interface)
-    // FIXME: Use union types when supported: http://crbug.com/372891

[fs, 2014/11/24 13:20:24]

This bug seems to have some sort Restrict* label set (or at least I couldn't
access it).

[Jens Widell, 2014/11/24 13:38:24]

That's an unrelated crash bug (CC:ed oilpan-reviews@, so I could randomly see
it.)

The bug that ought to have been referenced here is: http://crbug.com/240176

[fs, 2014/11/24 13:49:07]

Thanks, that's the info I was probing for. As discussed elsewhere, I'll replace
the ref to the above (240176) with 430337.

-    [Custom] attribute object strokeStyle; // (default black)
-    [Custom] attribute object fillStyle; // (default black)
+    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;
 
@@ skipping 62 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;