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

ui/android/overscroll_glow.h

Index: ui/android/overscroll_glow.h
diff --git a/ui/android/overscroll_glow.h b/ui/android/overscroll_glow.h
index 8253de04575409bc89361f322adc9399fa1c124f..62a7a38d43d47306933babb7288870a6ab745732 100644
--- a/ui/android/overscroll_glow.h
+++ b/ui/android/overscroll_glow.h
@@ -47,11 +47,12 @@ class UI_ANDROID_EXPORT OverscrollGlow {
   // |velocity| is in device pixels / second.
   // |overscroll_location| is the coordinate of the causal overscrolling event.
   // Returns true if the effect still needs animation ticks.
-  bool OnOverscrolled(base::TimeTicks current_time,
-                      const gfx::Vector2dF& accumulated_overscroll,
-                      gfx::Vector2dF overscroll_delta,
-                      gfx::Vector2dF velocity,
-                      const gfx::Vector2dF& overscroll_location);
+  // This method is made virtual for mocking.
+  virtual bool OnOverscrolled(base::TimeTicks current_time,
+                              const gfx::Vector2dF& accumulated_overscroll,
+                              gfx::Vector2dF overscroll_delta,

[dcheng, 2017/08/25 23:12:17]

Not introduced by this CL, but shouldn't these all be uniformly const
gfx::Vector2dF& or consistently pass by value?

[sunyunjia, 2017/08/29 17:32:31]

Done.

+                              gfx::Vector2dF velocity,
+                              const gfx::Vector2dF& overscroll_location);
 
   // Returns true if the effect still needs animation ticks, with effect layers
   // attached to |parent_layer| if necessary.