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..caaf5ad4110dc6ac272f818eb1adff4ed00ed479 100644
--- a/ui/android/overscroll_glow.h
+++ b/ui/android/overscroll_glow.h
@@ -40,6 +40,8 @@ class UI_ANDROID_EXPORT OverscrollGlow {
   // The effect is enabled by default, but will remain dormant until the first
   // overscroll event.
   explicit OverscrollGlow(OverscrollGlowClient* client);
+  // This constructor is for test only.

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

Why is this needed? Can't we just use the above constructor
and pass in null for client?

Presumably in your test client_ is never used otherwise they
would crash. So it should be fair to just move the DCHECK to
methods that actually use client_ instead of constructor.

[sunyunjia, 2017/07/19 20:44:12]

Done.

+  OverscrollGlow();
   ~OverscrollGlow();
 
   // Called when the root content layer overscrolls.
@@ -47,11 +49,11 @@ 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);
+  virtual bool OnOverscrolled(base::TimeTicks current_time,
+                              const gfx::Vector2dF& accumulated_overscroll,
+                              gfx::Vector2dF overscroll_delta,
+                              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.