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..07bf18db95f0e78efbad743b56cbd5f1b85ff3fe 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 the controller
+  // decides it can navigate based on the consumed result and
+  // scroll-boundary-behavior.

[majidvp, 2017/07/20 13:26:55]

Similar to the previous comment let's try to specify *exactly* the condition
under which the effect will be activated.

[sunyunjia, 2017/07/21 13:52:23]

Done.

+  virtual void OnOverscrolled(bool can_navigate);
 
   // Returns true if the effect has consumed the |scroll_delta|.
   bool WillHandleScrollUpdate(const gfx::Vector2dF& scroll_delta);
@@ -58,10 +59,10 @@ class UI_ANDROID_EXPORT OverscrollRefresh {
   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);