Update last few users of deprecated CreateShadowDrawLooper and remove

ui/gfx/skia_paint_util.cc

Index: ui/gfx/skia_paint_util.cc
diff --git a/ui/gfx/skia_paint_util.cc b/ui/gfx/skia_paint_util.cc
index e162b37458279b10bbfc2347b34c7c6f62372c1b..dcaea71be1e1ea9e55fa1bd5a9c5cb507f5bd41c 100644
--- a/ui/gfx/skia_paint_util.cc
+++ b/ui/gfx/skia_paint_util.cc
@@ -53,13 +53,6 @@ sk_sp<cc::PaintShader> CreateGradientShader(int start_point,
       grad_points, grad_colors, NULL, 2, cc::PaintShader::kClamp_TileMode));
 }
 
-// TODO(estade): remove. Only exists to support legacy CreateShadowDrawLooper.
-static SkScalar DeprecatedRadiusToSigma(double radius) {
-  // This captures historically what skia did under the hood. Now skia accepts
-  // sigma, not radius, so we perform the conversion.
-  return radius > 0 ? SkDoubleToScalar(0.57735f * radius + 0.5) : 0;
-}
-
 // This is copied from
 // third_party/WebKit/Source/platform/graphics/skia/SkiaUtils.h
 static SkScalar RadiusToSigma(double radius) {
@@ -89,41 +82,6 @@ sk_sp<SkDrawLooper> CreateShadowDrawLooper(
     SkPaint* paint = looper_builder.addLayer(layer_info);
     // SkBlurMaskFilter's blur radius defines the range to extend the blur from
     // original mask, which is half of blur amount as defined in ShadowValue.
-    // Note that because this function uses DeprecatedRadiusToSigma, it actually
-    // creates a draw looper with roughly twice the desired blur.
-    paint->setMaskFilter(SkBlurMaskFilter::Make(
-        kNormal_SkBlurStyle, DeprecatedRadiusToSigma(shadow.blur() / 2),
-        SkBlurMaskFilter::kHighQuality_BlurFlag));
-    paint->setColorFilter(
-        SkColorFilter::MakeModeFilter(shadow.color(), SkBlendMode::kSrcIn));
-  }
-
-  return looper_builder.detach();
-}
-
-sk_sp<SkDrawLooper> CreateShadowDrawLooperCorrectBlur(
-    const std::vector<ShadowValue>& shadows) {
-  if (shadows.empty())
-    return nullptr;
-
-  SkLayerDrawLooper::Builder looper_builder;
-
-  looper_builder.addLayer();  // top layer of the original.
-
-  SkLayerDrawLooper::LayerInfo layer_info;
-  layer_info.fPaintBits |= SkLayerDrawLooper::kMaskFilter_Bit;
-  layer_info.fPaintBits |= SkLayerDrawLooper::kColorFilter_Bit;
-  layer_info.fColorMode = SkBlendMode::kSrc;
-
-  for (size_t i = 0; i < shadows.size(); ++i) {
-    const ShadowValue& shadow = shadows[i];
-
-    layer_info.fOffset.set(SkIntToScalar(shadow.x()),
-                           SkIntToScalar(shadow.y()));
-
-    SkPaint* paint = looper_builder.addLayer(layer_info);
-    // SkBlurMaskFilter's blur radius defines the range to extend the blur from
-    // original mask, which is half of blur amount as defined in ShadowValue.
     paint->setMaskFilter(SkBlurMaskFilter::Make(
         kNormal_SkBlurStyle, RadiusToSigma(shadow.blur() / 2),
         SkBlurMaskFilter::kHighQuality_BlurFlag));