cc: Enable composited border-radius scrolling.

third_party/WebKit/Source/core/layout/compositing/CompositedLayerMappingTest.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 "core/layout/compositing/CompositedLayerMapping.h"
 
 #include "core/frame/LocalFrameView.h"
 #include "core/layout/LayoutBoxModelObject.h"
 #include "core/layout/LayoutTestHelper.h"
 #include "core/layout/api/LayoutViewItem.h"
@@ skipping 903 matching lines @@
   mapping = paint_layer->GetCompositedLayerMapping();
   EXPECT_FALSE(mapping->DecorationOutlineLayer());
 }
 
 TEST_P(CompositedLayerMappingTest,
        BackgroundPaintedIntoGraphicsLayerIfNotCompositedScrolling) {
   GetDocument().GetFrame()->GetSettings()->SetPreferCompositingToLCDTextEnabled(
       true);
   SetBodyInnerHTML(
       "<div id='container' style='overflow: scroll; width: 300px; height: "
-      "300px; border-radius: 5px; background: white; will-change: transform;'>"
-      "    <div style='background-color: blue; width: 2000px; height: "
+      "300px; background: white; will-change: transform;'>"
+      "    <div style='background-color: blue; clip-path: circle(600px at "
+      "1000px 1000px); width: 2000px; height: "
       "2000px;'></div>"
       "</div>");
 
   PaintLayer* layer =
       ToLayoutBlock(GetLayoutObjectByElementId("container"))->Layer();
   EXPECT_EQ(kBackgroundPaintInScrollingContents,
             layer->GetBackgroundPaintLocation());
 
   // We currently don't use composited scrolling when the container has a
   // border-radius so even though we can paint the background onto the scrolling
@@ skipping 931 matching lines @@
   ASSERT_TRUE(target && target->IsBox());
   PaintLayer* target_layer = ToLayoutBox(target)->Layer();
   GraphicsLayer* target_graphics_layer =
       target_layer ? target_layer->GraphicsLayerBacking() : nullptr;
   ASSERT_TRUE(target_graphics_layer);
   EXPECT_TRUE(
       target_graphics_layer->ContentLayer()->TransformedRasterizationAllowed());
 }
 
 }  // namespace blink