Use separate-sigma version of SkDropShadowImageFilter::Create

cc/output/render_surface_filters.cc

 // Copyright 2012 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 "cc/output/render_surface_filters.h"
 
 #include <algorithm>
 
 #include "base/logging.h"
 #include "cc/output/filter_operation.h"
@@ skipping 191 matching lines @@
         break;
       case FilterOperation::BLUR:
         image_filter = skia::AdoptRef(SkBlurImageFilter::Create(
             op.amount(), op.amount(), image_filter.get()));
         break;
       case FilterOperation::DROP_SHADOW:
         image_filter = skia::AdoptRef(SkDropShadowImageFilter::Create(
             SkIntToScalar(op.drop_shadow_offset().x()),
             SkIntToScalar(op.drop_shadow_offset().y()),
             SkIntToScalar(op.amount()),
+            SkIntToScalar(op.amount()),
             op.drop_shadow_color(),
             image_filter.get()));
         break;
       case FilterOperation::COLOR_MATRIX:
         image_filter = CreateMatrixImageFilter(op.matrix(), image_filter);
         break;
       case FilterOperation::ZOOM: {
         skia::RefPtr<SkImageFilter> zoom_filter =
             skia::AdoptRef(SkMagnifierImageFilter::Create(
                 SkRect::MakeXYWH(
@@ skipping 51 matching lines @@
           image_filter = alpha_filter;
         }
         break;
       }
     }
   }
   return image_filter;
 }
 
 }  // namespace cc