Use SkLayerDrawLooper::Builder to construct SkLayerDrawLooper.

Source/platform/graphics/GraphicsContext.cpp

Index: Source/platform/graphics/GraphicsContext.cpp
diff --git a/Source/platform/graphics/GraphicsContext.cpp b/Source/platform/graphics/GraphicsContext.cpp
index 682c3c61c6bf5e5b252beb3d000be66adc746994..fd3eac56f0aeeee107279634d046696cb8e5f64f 100644
--- a/Source/platform/graphics/GraphicsContext.cpp
+++ b/Source/platform/graphics/GraphicsContext.cpp
@@ -291,8 +291,8 @@ void GraphicsContext::setFillGradient(PassRefPtr<Gradient> gradient)
 }
 
 void GraphicsContext::setShadow(const FloatSize& offset, float blur, const Color& color,
-    DrawLooper::ShadowTransformMode shadowTransformMode,
-    DrawLooper::ShadowAlphaMode shadowAlphaMode)
+    DrawLooperBuilder::ShadowTransformMode shadowTransformMode,
+    DrawLooperBuilder::ShadowAlphaMode shadowAlphaMode)
 {
     if (paintingDisabled())
         return;
@@ -302,18 +302,18 @@ void GraphicsContext::setShadow(const FloatSize& offset, float blur, const Color
         return;
     }
 
-    DrawLooper drawLooper;
-    drawLooper.addShadow(offset, blur, color, shadowTransformMode, shadowAlphaMode);
-    drawLooper.addUnmodifiedContent();
-    setDrawLooper(drawLooper);
+    OwnPtr<DrawLooperBuilder> drawLooperBuilder = DrawLooperBuilder::create();
+    drawLooperBuilder->addShadow(offset, blur, color, shadowTransformMode, shadowAlphaMode);
+    drawLooperBuilder->addUnmodifiedContent();
+    setDrawLooper(drawLooperBuilder.release());
 }
 
-void GraphicsContext::setDrawLooper(const DrawLooper& drawLooper)
+void GraphicsContext::setDrawLooper(PassOwnPtr<DrawLooperBuilder> drawLooperBuilder)
 {
     if (paintingDisabled())
         return;
 
-    mutableState()->setDrawLooper(drawLooper);
+    mutableState()->setDrawLooper(drawLooperBuilder->detachDrawLooper());
 }
 
 void GraphicsContext::clearDrawLooper()
@@ -710,10 +710,10 @@ void GraphicsContext::drawInnerShadow(const RoundedRect& rect, const Color& shad
         clip(rect.rect());
     }
 
-    DrawLooper drawLooper;
-    drawLooper.addShadow(shadowOffset, shadowBlur, shadowColor,
-        DrawLooper::ShadowRespectsTransforms, DrawLooper::ShadowIgnoresAlpha);
-    setDrawLooper(drawLooper);
+    OwnPtr<DrawLooperBuilder> drawLooperBuilder = DrawLooperBuilder::create();
+    drawLooperBuilder->addShadow(shadowOffset, shadowBlur, shadowColor,
+        DrawLooperBuilder::ShadowRespectsTransforms, DrawLooperBuilder::ShadowIgnoresAlpha);
+    setDrawLooper(drawLooperBuilder.release());
     fillRectWithRoundedHole(outerRect, roundedHole, fillColor);
     restore();
     clearDrawLooper();