Enable compositing for opaque scrolling content on low DPI screens

third_party/WebKit/Source/core/paint/PaintLayerScrollableAreaTest.h

Index: third_party/WebKit/Source/core/paint/PaintLayerScrollableAreaTest.h
diff --git a/third_party/WebKit/Source/core/paint/PaintLayerScrollableAreaTest.h b/third_party/WebKit/Source/core/paint/PaintLayerScrollableAreaTest.h
new file mode 100644
index 0000000000000000000000000000000000000000..e3906f0d0cb2991dc809f5676239f6dcbe17d569
--- /dev/null
+++ b/third_party/WebKit/Source/core/paint/PaintLayerScrollableAreaTest.h
@@ -0,0 +1,34 @@
+// Copyright 2016 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/frame/FrameView.h"
+#include "core/layout/LayoutBoxModelObject.h"
+#include "core/layout/LayoutTestHelper.h"
+#include "core/layout/api/LayoutViewItem.h"
+#include "core/paint/PaintLayer.h"
+#include "core/paint/PaintLayerScrollableArea.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+class PaintLayerScrollableAreaTest : public RenderingTest {
+public:
+    PaintLayerScrollableAreaTest()
+        : RenderingTest(SingleChildFrameLoaderClient::create())
+    { }
+
+private:
+    void SetUp() override
+    {
+        RenderingTest::SetUp();
+        enableCompositing();
+    }
+
+    void TearDown() override
+    {
+        RenderingTest::TearDown();
+    }
+};
+
+}