Convert SkLayerDrawLooper::addLayerOnTop calls to use addLayer instead

third_party/WebKit/Source/core/style/ShadowList.cpp

Index: third_party/WebKit/Source/core/style/ShadowList.cpp
diff --git a/third_party/WebKit/Source/core/style/ShadowList.cpp b/third_party/WebKit/Source/core/style/ShadowList.cpp
index 9f0c7e35523ea5c3424f9c11877ac4fef73cd4cc..ddefc4669fd36c6aa32f64eed5f52c7cc974210a 100644
--- a/third_party/WebKit/Source/core/style/ShadowList.cpp
+++ b/third_party/WebKit/Source/core/style/ShadowList.cpp
@@ -81,14 +81,13 @@ PassRefPtr<ShadowList> ShadowList::blend(const ShadowList* from, const ShadowLis
 PassOwnPtr<DrawLooperBuilder> ShadowList::createDrawLooper(DrawLooperBuilder::ShadowAlphaMode alphaMode, const Color& currentColor, bool isHorizontal) const
 {
     OwnPtr<DrawLooperBuilder> drawLooperBuilder = DrawLooperBuilder::create();
-    for (size_t i = shadows().size(); i--; ) {
-        const ShadowData& shadow = shadows()[i];
+    drawLooperBuilder->addUnmodifiedContent();
+    for (const ShadowData& shadow : shadows()) {
         float shadowX = isHorizontal ? shadow.x() : shadow.y();
         float shadowY = isHorizontal ? shadow.y() : -shadow.x();
         drawLooperBuilder->addShadow(FloatSize(shadowX, shadowY), shadow.blur(), shadow.color().resolve(currentColor),
             DrawLooperBuilder::ShadowRespectsTransforms, alphaMode);
     }
-    drawLooperBuilder->addUnmodifiedContent();
     return drawLooperBuilder.release();
 }