Don't cache reflection drawings

Source/platform/graphics/paint/DisplayItemCacheSkipper.h

+// Copyright 2015 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.
+
+#ifndef DisplayItemCacheSkipper_h
+#define DisplayItemCacheSkipper_h
+
+#include "platform/RuntimeEnabledFeatures.h"
+#include "platform/graphics/GraphicsContext.h"
+#include "platform/graphics/paint/DisplayItemList.h"
+
+namespace blink {
+
+class DisplayItemCacheSkipper {
+public:
+    DisplayItemCacheSkipper(GraphicsContext& context)
+        : m_context(context)
+    {
+        if (RuntimeEnabledFeatures::slimmingPaintEnabled())
+            context.displayItemList()->beginSkippingCache();
+    }
+    ~DisplayItemCacheSkipper()
+    {
+        if (RuntimeEnabledFeatures::slimmingPaintEnabled())
+            m_context.displayItemList()->endSkippingCache();
+    }
+
+private:
+    GraphicsContext& m_context;
+};
+
+} // namespace blink
+
+#endif // DisplayItemCacheSkipper_h