import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

gfx/layers/ipc/APZChild.h

@@ -0,0 +1,55 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=4 ts=8 et tw=80 : */
+/* 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/. */
+
+#ifndef mozilla_layers_APZChild_h
+#define mozilla_layers_APZChild_h
+
+#include "mozilla/layers/PAPZChild.h"
+
+namespace mozilla {
+
+namespace layers {
+
+class GeckoContentController;
+
+/**
+ * APZChild implements PAPZChild and is used to remote a GeckoContentController
+ * that lives in a different process than where APZ lives.
+ */
+class APZChild final : public PAPZChild
+{
+public:
+  explicit APZChild(RefPtr<GeckoContentController> aController);
+  ~APZChild();
+
+  bool RecvRequestContentRepaint(const FrameMetrics& frame) override;
+
+  bool RecvUpdateOverscrollVelocity(const float& aX, const float& aY, const bool& aIsRootContent) override;
+
+  bool RecvUpdateOverscrollOffset(const float& aX, const float& aY, const bool& aIsRootContent) override;
+
+  bool RecvSetScrollingRootContent(const bool& aIsRootContent) override;
+
+  bool RecvNotifyMozMouseScrollEvent(const ViewID& aScrollId,
+                                     const nsString& aEvent) override;
+
+  bool RecvNotifyAPZStateChange(const ScrollableLayerGuid& aGuid,
+                                const APZStateChange& aChange,
+                                const int& aArg) override;
+
+  bool RecvNotifyFlushComplete() override;
+
+  bool RecvDestroy() override;
+
+private:
+  RefPtr<GeckoContentController> mController;
+};
+
+} // namespace layers
+
+} // namespace mozilla
+
+#endif // mozilla_layers_APZChild_h