Add use counters for recently launched canvas features

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 39 matching lines @@
     void scale(unrestricted double x, unrestricted double y);
     void rotate(unrestricted double angle);
     void translate(unrestricted double x, unrestricted double y);
     void transform(unrestricted double a, unrestricted double b, unrestricted double c, unrestricted double d, unrestricted double e, unrestricted double f);
     void setTransform(unrestricted double a, unrestricted double b, unrestricted double c, unrestricted double d, unrestricted double e, unrestricted double f);
     void resetTransform();
 
     // compositing
     attribute unrestricted double globalAlpha; // (default 1.0)
     attribute DOMString globalCompositeOperation; // (default source-over)
-    attribute DOMString filter; // (default 'none')
+    [MeasureAs=Canvas2DFilter] attribute DOMString filter; // (default 'none')
 
     // image smoothing
-    [MeasureAs=UnprefixedImageSmoothingEnabled] attribute boolean imageSmoothingEnabled; // (default True)
-    attribute ImageSmoothingQuality imageSmoothingQuality; // (default "low")
+    attribute boolean imageSmoothingEnabled; // (default True)
+    [MeasureAs=Canvas2DImageSmoothingQuality]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(double x0, double y0, double x1, double y1);
     [RaisesException] CanvasGradient createRadialGradient(double x0, double y0, double r0, double x1, double y1, double r1);
     [CallWith=ScriptState, RaisesException] CanvasPattern? createPattern(CanvasImageSource image, [TreatNullAs=NullString] DOMString repetitionType);
 
     // shadows
     attribute unrestricted double shadowOffsetX;
@@ skipping 66 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;