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

ui/events/blink/did_overscroll_params.cc

Index: ui/events/blink/did_overscroll_params.cc
diff --git a/ui/events/blink/did_overscroll_params.cc b/ui/events/blink/did_overscroll_params.cc
index 9f029b4824b3ac39257923f28567f6ad6a74970d..be410be1eb2cfcf6163c6da24fbe36d611c88474 100644
--- a/ui/events/blink/did_overscroll_params.cc
+++ b/ui/events/blink/did_overscroll_params.cc
@@ -10,4 +10,16 @@ DidOverscrollParams::DidOverscrollParams() {}
 
 DidOverscrollParams::~DidOverscrollParams() {}
 
+void DidOverscrollParams::ClearX() {
+  accumulated_overscroll.set_x(0);
+  latest_overscroll_delta.set_x(0);
+  current_fling_velocity.set_x(0);
+}
+
+void DidOverscrollParams::ClearY() {
+  accumulated_overscroll.set_y(0);
+  latest_overscroll_delta.set_y(0);
+  current_fling_velocity.set_y(0);
+}

[majidvp, 2017/05/18 15:26:10]

These methods are used only once and it the logic is pretty simple. I suggest
not having them in favor of the same logic 
at the call site.

[sunyunjia, 2017/05/19 20:14:24]

Done.

+
 }  // namespace ui