Fixed Shadow blur for transparent objects

Source/core/paint/BoxPainter.cpp

 // Copyright 2014 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 "config.h"
 #include "core/paint/BoxPainter.h"
 
 #include "core/HTMLNames.h"
 #include "core/frame/Settings.h"
 #include "core/html/HTMLFrameOwnerElement.h"
@@ skipping 1905 matching lines @@
                             rectToClipOut.inflate(-1);
                     }
 
                     if (!rectToClipOut.isEmpty()) {
                         context->clipOut(rectToClipOut);
                     }
                 }
             }
 
             // Draw only the shadow.
-            OwnPtr<DrawLooperBuilder> drawLooperBuilder = DrawLooperBuilder::create();
-            drawLooperBuilder->addShadow(shadowOffset, shadowBlur, shadowColor,
-                DrawLooperBuilder::ShadowRespectsTransforms, DrawLooperBuilder::ShadowIgnoresAlpha);
-            context->setDrawLooper(drawLooperBuilder.release());
+            context->setShadow(shadowOffset, shadowBlur, shadowColor, DrawLooperBuilder::ShadowRespectsTransforms, DrawLooperBuilder::ShadowIgnoresAlpha, DrawShadowOnly);
 
             if (hasBorderRadius) {
                 RoundedRect influenceRect(pixelSnappedIntRect(LayoutRect(shadowRect)), border.radii());
                 influenceRect.expandRadii(2 * shadowBlur + shadowSpread);
                 if (allCornersClippedOut(influenceRect, info.rect)) {
                     context->fillRect(fillRect, Color::black);
                 } else {
                     // TODO: support non-integer shadows - crbug.com/334829
                     RoundedRect roundedFillRect = border;
                     roundedFillRect.inflate(shadowSpread);
@@ skipping 207 matching lines @@
 
     FloatPoint secondQuad[4];
     secondQuad[0] = quad[0];
     secondQuad[1] = FloatPoint(quad[0].x() - r1 * cx, quad[0].y() - r1 * cy);
     secondQuad[2] = quad[2];
     secondQuad[3] = quad[3];
     graphicsContext->clipPolygon(4, secondQuad, !secondEdgeMatches);
 }
 
 } // namespace blink