import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

layout/generic/nsBackdropFrame.h

@@ -0,0 +1,47 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+// vim:cindent:ts=2:et:sw=2:
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* rendering object for CSS "::backdrop" */
+
+#ifndef nsBackdropFrame_h___
+#define nsBackdropFrame_h___
+
+#include "nsFrame.h"
+
+class nsBackdropFrame final : public nsFrame
+{
+public:
+  NS_DECL_FRAMEARENA_HELPERS
+
+  explicit nsBackdropFrame(nsStyleContext* aContext)
+    : nsFrame(aContext) { }
+
+  // nsIFrame overrides
+  virtual nsIAtom* GetType() const override;
+#ifdef DEBUG_FRAME_DUMP
+  virtual nsresult GetFrameName(nsAString& aResult) const override;
+#endif
+  virtual nsStyleContext*
+    GetParentStyleContext(nsIFrame** aProviderFrame) const override;
+  virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
+                                const nsRect& aDirtyRect,
+                                const nsDisplayListSet& aLists) override;
+  virtual mozilla::LogicalSize
+    ComputeAutoSize(nsRenderingContext*         aRenderingContext,
+                    mozilla::WritingMode        aWM,
+                    const mozilla::LogicalSize& aCBSize,
+                    nscoord                     aAvailableISize,
+                    const mozilla::LogicalSize& aMargin,
+                    const mozilla::LogicalSize& aBorder,
+                    const mozilla::LogicalSize& aPadding,
+                    ComputeSizeFlags            aFlags) override;
+  virtual void Reflow(nsPresContext* aPresContext,
+                      ReflowOutput& aDesiredSize,
+                      const ReflowInput& aReflowInput,
+                      nsReflowStatus& aStatus) override;
+};
+
+#endif // nsBackdropFrame_h___