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

ui/android/overscroll_refresh.h

Index: ui/android/overscroll_refresh.h
diff --git a/ui/android/overscroll_refresh.h b/ui/android/overscroll_refresh.h
index 7cb98e272ce711c843103d3b2ffa62d33b9296b5..1e06bc1f2fd8f474ee5660506968973c5aa18f1b 100644
--- a/ui/android/overscroll_refresh.h
+++ b/ui/android/overscroll_refresh.h
@@ -37,9 +37,10 @@ class UI_ANDROID_EXPORT OverscrollRefresh {
   // Returns whether the refresh was activated.
   void OnScrollEnd(const gfx::Vector2dF& velocity);
 
-  // Scroll ack listener. The effect will only be activated if the initial
-  // updates go unconsumed.
-  void OnScrollUpdateAck(bool was_consumed);
+  // Scroll ack listener. The effect will only be activated if |can_navigate|
+  // is true which happens when the scroll update is not consumed and the
+  // scroll_boundary_behavior on y axis is 'auto'.

[boliu, 2017/08/23 19:17:03]

comment on virtual methods that they are virtual for mocking

[sunyunjia, 2017/08/23 23:47:06]

Done.

+  virtual void OnOverscrolled();
 
   // Returns true if the effect has consumed the |scroll_delta|.
   bool WillHandleScrollUpdate(const gfx::Vector2dF& scroll_delta);
@@ -55,13 +56,13 @@ class UI_ANDROID_EXPORT OverscrollRefresh {
 
   // Reset the effect to its inactive state, immediately detaching and
   // disabling any active effects.
-  void Reset();
+  virtual void Reset();
 
   // Returns true if the refresh effect is either being manipulated or animated.
-  bool IsActive() const;
+  virtual bool IsActive() const;
 
   // Returns true if the effect is waiting for an unconsumed scroll to start.
-  bool IsAwaitingScrollUpdateAck() const;
+  virtual bool IsAwaitingScrollUpdateAck() const;
 
  private:
   void Release(bool allow_refresh);