Scale focus outline thickness with zoom level.

third_party/WebKit/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 113 matching lines @@
 // 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);
   if (radius == 0)
     return 0.0f;
   return 0.288675f * radius + 0.5f;
 }
 
 template <typename PrimitiveType>
-void drawPlatformFocusRing(const PrimitiveType&, SkCanvas*, SkColor, int width);
+void drawPlatformFocusRing(const PrimitiveType&,
+                           SkCanvas*,
+                           SkColor,
+                           float width);
 
 // TODO(fmalita): remove in favor of direct SrcRectConstraint use.
 inline SkCanvas::SrcRectConstraint WebCoreClampingModeToSkiaRectConstraint(
     Image::ImageClampingMode clampMode) {
   return clampMode == Image::ClampImageToSourceRect
              ? SkCanvas::kStrict_SrcRectConstraint
              : SkCanvas::kFast_SrcRectConstraint;
 }
 
 // Skia's smart pointer APIs are preferable over their legacy raw pointer
@@ skipping 26 matching lines @@
 //     paint.setShader(SkShader::MakeFoo(...));
 //
 // b) shared ownership
 //
 //     sk_sp<SkShader> shader = SkShader::MakeFoo(...);
 //     paint.setShader(shader);
 
 }  // namespace blink
 
 #endif  // SkiaUtils_h