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

ui/android/overscroll_glow.cc

 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/android/overscroll_glow.h"
 
 #include <stddef.h>
 
 #include "cc/layers/layer.h"
 #include "ui/android/edge_effect_base.h"
@@ skipping 24 matching lines @@
 
 OverscrollGlow::OverscrollGlow(OverscrollGlowClient* client)
     : client_(client),
       edge_offsets_(),
       initialized_(false),
       allow_horizontal_overscroll_(true),
       allow_vertical_overscroll_(true) {
   DCHECK(client);
 }
 
+OverscrollGlow::OverscrollGlow()
+    : client_(nullptr),
+      edge_offsets_(),
+      initialized_(false),
+      allow_horizontal_overscroll_(true),
+      allow_vertical_overscroll_(true) {}
+
 OverscrollGlow::~OverscrollGlow() {
   Detach();
 }
 
 void OverscrollGlow::Reset() {
   if (!initialized_)
     return;
   Detach();
   for (size_t i = 0; i < EDGE_COUNT; ++i)
     edge_effects_[i]->Finish();
@@ skipping 217 matching lines @@
   for (size_t i = 0; i < EDGE_COUNT; ++i)
     edge_effects_[i]->Release(current_time);
 }
 
 EdgeEffectBase* OverscrollGlow::GetOppositeEdge(int edge_index) {
   DCHECK(initialized_);
   return edge_effects_[(edge_index + 2) % EDGE_COUNT].get();
 }
 
 }  // namespace ui