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

content/browser/android/overscroll_controller_android.h

Index: content/browser/android/overscroll_controller_android.h
diff --git a/content/browser/android/overscroll_controller_android.h b/content/browser/android/overscroll_controller_android.h
index f049bdc2cd9200ac46d1aa52407a2eb7bcd3938c..bf3d23ef22eb555ab0280e899af20f8a320e06c0 100644
--- a/content/browser/android/overscroll_controller_android.h
+++ b/content/browser/android/overscroll_controller_android.h
@@ -10,6 +10,7 @@
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "base/time/time.h"
+#include "content/common/content_export.h"
 #include "content/common/input/input_event_ack_state.h"
 #include "ui/android/overscroll_glow.h"
 #include "ui/android/overscroll_refresh.h"
@@ -34,8 +35,14 @@ namespace content {
 // Glue class for handling all inputs into Android-specific overscroll effects,
 // both the passive overscroll glow and the active overscroll pull-to-refresh.
 // Note that all input coordinates (both for events and overscroll) are in DIPs.
-class OverscrollControllerAndroid : public ui::OverscrollGlowClient {
+class CONTENT_EXPORT OverscrollControllerAndroid
+    : public ui::OverscrollGlowClient {
  public:
+  OverscrollControllerAndroid(
+      ui::WindowAndroidCompositor* compositor,
+      float dpi_scale,
+      std::unique_ptr<ui::OverscrollGlow> glow_effect,
+      std::unique_ptr<ui::OverscrollRefresh> refresh_effect);
   OverscrollControllerAndroid(
       ui::OverscrollRefreshHandler* overscroll_refresh_handler,
       ui::WindowAndroidCompositor* compositor,
@@ -75,6 +82,7 @@ class OverscrollControllerAndroid : public ui::OverscrollGlowClient {
   const float dpi_scale_;
 
   bool enabled_;
+  bool scroll_update_consumed_;

[aelias_OOO_until_Jul13, 2017/08/11 21:50:32]

This is refresh-effect specific so it should be stored in the OverscrollRefresh
class.  I also think an additional boolean can and should be avoided, I suggest
making this part of the existing OverScrollRefresh::scroll_consumption_state_
state machine.

[sunyunjia, 2017/08/18 18:44:06]

Done.

 
   // TODO(jdduke): Factor out a common API from the two overscroll effects.
   std::unique_ptr<ui::OverscrollGlow> glow_effect_;