Removing the dependency on GraphicsContext for drawing images in 2D canvas

Source/platform/graphics/skia/SkiaUtils.h

 /*
  * Copyright (c) 2006,2007,2008, Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 109 matching lines @@
 InterpolationQuality limitInterpolationQuality(const GraphicsContext*, InterpolationQuality resampling);
 
 InterpolationQuality computeInterpolationQuality(
     const SkMatrix&,
     float srcWidth,
     float srcHeight,
     float destWidth,
     float destHeight,
     bool isDataComplete = true);
 
-bool shouldDrawAntiAliased(const GraphicsContext*, const SkRect& destRect);
-
 // This replicates the old skia behavior when it used to take radius for blur. Now it takes sigma.
 inline SkScalar skBlurRadiusToSigma(SkScalar radius)
 {
     SkASSERT(radius >= 0);
     return 0.288675f * radius + 0.5f;
 }
 
+template<typename DrawFunc>
+void drawPlatformFocusRing(const DrawFunc& drawFunc, SkColor color, int width)
+{
+    SkPaint paint;
+    paint.setAntiAlias(true);
+    paint.setStyle(SkPaint::kStroke_Style);
+    paint.setColor(color);
+
+#if OS(MACOSX)
+    paint.setStrokeWidth(width);
+    paint.setAlpha(64);
+    float cornerRadius = (width - 1) * 0.5f;
+#else
+    paint.setStrokeWidth(1);
+    const float cornerRadius = 1;
+#endif
+
+    drawFunc(paint, cornerRadius);
+
+#if OS(MACOSX)
+    // Inner part
+    paint.setAlpha(128);
+    paint.setStrokeWidth(paint.getStrokeWidth() * 0.5f);
+    drawFunc(paint, cornerRadius);
+#endif
+}
+
 } // namespace blink
 
 #endif  // SkiaUtils_h