Update last few users of deprecated CreateShadowDrawLooper and remove

ui/gfx/skia_paint_util.cc

 // Copyright (c) 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/gfx/skia_paint_util.h"
 
 #include "third_party/skia/include/core/SkColorFilter.h"
 #include "third_party/skia/include/effects/SkBlurMaskFilter.h"
 #include "third_party/skia/include/effects/SkGradientShader.h"
 #include "third_party/skia/include/effects/SkLayerDrawLooper.h"
@@ skipping 35 matching lines @@
                                             SkColor end_color) {
   SkColor grad_colors[2] = {start_color, end_color};
   SkPoint grad_points[2];
   grad_points[0].iset(0, start_point);
   grad_points[1].iset(0, end_point);
 
   return cc::WrapSkShader(SkGradientShader::MakeLinear(
       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) {
   return radius > 0 ? SkDoubleToScalar(0.288675f * radius + 0.5f) : 0;
 }
 
 sk_sp<SkDrawLooper> CreateShadowDrawLooper(
     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.
-    // 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));
     paint->setColorFilter(
         SkColorFilter::MakeModeFilter(shadow.color(), SkBlendMode::kSrcIn));
   }
 
   return looper_builder.detach();
 }
 
 }  // namespace gfx