Removing webkit-prefixed image data HD APIs from 2D canvas

Source/core/html/canvas/CanvasRenderingContext2D.idl

Index: Source/core/html/canvas/CanvasRenderingContext2D.idl
diff --git a/Source/core/html/canvas/CanvasRenderingContext2D.idl b/Source/core/html/canvas/CanvasRenderingContext2D.idl
index ba68962755cd9f26628846f14b0cfbf0e23dfae0..dabd003372b774ef76a3d4d405da076b6e9619ae 100644
--- a/Source/core/html/canvas/CanvasRenderingContext2D.idl
+++ b/Source/core/html/canvas/CanvasRenderingContext2D.idl
@@ -150,9 +150,6 @@ interface CanvasRenderingContext2D {
     [RaisesException] void putImageData(ImageData? imagedata, float dx, float dy);
     [RaisesException] void putImageData(ImageData? imagedata, float dx, float dy, float dirtyX, float dirtyY, float dirtyWidth, float dirtyHeight);
 
-    [RaisesException, DeprecateAs=PrefixedPutImageDataHD] void webkitPutImageDataHD(ImageData? imagedata, float dx, float dy);
-    [RaisesException, DeprecateAs=PrefixedPutImageDataHD] void webkitPutImageDataHD(ImageData? imagedata, float dx, float dy, float dirtyX, float dirtyY, float dirtyWidth, float dirtyHeight);
-
     [RaisesException] CanvasPattern createPattern(HTMLCanvasElement? canvas, [TreatNullAs=NullString] DOMString repetitionType);
     [RaisesException] CanvasPattern createPattern(HTMLImageElement? image, [TreatNullAs=NullString] DOMString repetitionType);
     [RaisesException] CanvasPattern createPattern(HTMLVideoElement? image, [TreatNullAs=NullString] DOMString repetitionType);
@@ -165,14 +162,10 @@ interface CanvasRenderingContext2D {
     // pixel manipulation
     [RaisesException] ImageData getImageData(float sx, float sy, float sw, float sh);
 
-    [RaisesException, DeprecateAs=PrefixedGetImageDataHD] ImageData webkitGetImageDataHD(float sx, float sy, float sw, float sh);
-
     // Focus rings
     [RuntimeEnabled=ExperimentalCanvasFeatures] void drawFocusIfNeeded(Element element);
     [RuntimeEnabled=ExperimentalCanvasFeatures] boolean drawCustomFocusRing(Element element);
 
-    readonly attribute float webkitBackingStorePixelRatio;
-
     [ImplementedAs=imageSmoothingEnabled, MeasureAs=PrefixedImageSmoothingEnabled] attribute boolean webkitImageSmoothingEnabled;
     [MeasureAs=UnprefixedImageSmoothingEnabled] attribute boolean imageSmoothingEnabled;