Use scroll-boundary-behavior to control overscroll-refresh/glow on android.

third_party/WebKit/public/platform/WebScrollBoundaryBehavior.h

+// Copyright 2017 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 WebScrollBoundaryBehavior_h
+#define WebScrollBoundaryBehavior_h
+
+#include "cc/input/scroll_boundary_behavior.h"
+
+using cc::ScrollBoundaryBehavior;
+
+namespace blink {
+
+struct WebScrollBoundaryBehavior : public ScrollBoundaryBehavior {

[dtapuska, 2017/05/23 17:13:40]

Is this all really needed?

TouchAction was used this way...

https://cs.chromium.org/chromium/src/third_party/WebKit/public/platform/WebTo...

[sunyunjia, 2017/06/13 15:56:21]

IMHO, feels like it is more readable to separate x and y into two fields than to
combine them in one enum?

[majidvp, 2017/07/12 21:04:20]

I believe dtapuska@ referring to the fact that we have two structs and one
inherits from the other. He is suggesting to just make the Web one alias for
the cc one. It seems reasonable.

You can still have two separate fields I believe.

+  using ScrollBoundaryBehaviorType =
+      ScrollBoundaryBehavior::ScrollBoundaryBehaviorType;
+  WebScrollBoundaryBehavior() : ScrollBoundaryBehavior() {}
+  WebScrollBoundaryBehavior(ScrollBoundaryBehaviorType type)
+      : ScrollBoundaryBehavior(type) {}
+  WebScrollBoundaryBehavior(ScrollBoundaryBehaviorType x_type,
+                            ScrollBoundaryBehaviorType y_type)
+      : ScrollBoundaryBehavior(x_type, y_type) {}
+};
+
+}  // namespace blink
+
+#endif