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

cc/trees/layer_tree_impl.h

 // Copyright 2012 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.
 
 #ifndef CC_TREES_LAYER_TREE_IMPL_H_
 #define CC_TREES_LAYER_TREE_IMPL_H_
 
 #include <map>
 #include <set>
 #include <string>
 #include <unordered_map>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/values.h"
 #include "cc/base/synced_property.h"
 #include "cc/input/event_listener_properties.h"
 #include "cc/input/layer_selection_bound.h"
+#include "cc/input/scroll_boundary_behavior.h"
 #include "cc/layers/layer_impl.h"
 #include "cc/layers/layer_list_iterator.h"
 #include "cc/output/begin_frame_args.h"
 #include "cc/output/swap_promise.h"
 #include "cc/resources/ui_resource_client.h"
 #include "cc/trees/layer_tree_host_impl.h"
 #include "cc/trees/property_tree.h"
 
 namespace base {
 namespace trace_event {
@@ skipping 454 matching lines @@
   bool SetCurrentBrowserControlsShownRatio(float ratio);
   float CurrentBrowserControlsShownRatio() const {
     return top_controls_shown_ratio_->Current(IsActiveTree());
   }
   void set_top_controls_height(float top_controls_height);
   float top_controls_height() const { return top_controls_height_; }
   void PushBrowserControlsFromMainThread(float top_controls_shown_ratio);
   void set_bottom_controls_height(float bottom_controls_height);
   float bottom_controls_height() const { return bottom_controls_height_; }
 
+  void set_scroll_boundary_behavior(const ScrollBoundaryBehavior& behavior);
+  ScrollBoundaryBehavior scroll_boundary_behavior() const {
+    return scroll_boundary_behavior_;
+  }
+
   void SetPendingPageScaleAnimation(
       std::unique_ptr<PendingPageScaleAnimation> pending_animation);
   std::unique_ptr<PendingPageScaleAnimation> TakePendingPageScaleAnimation();
 
   void DidUpdateScrollOffset(ElementId id);
 
   // Mark the scrollbar geometries (e.g., thumb size and position) as needing an
   // update.
   void SetScrollbarGeometriesNeedUpdate() {
     if (IsActiveTree()) {
@@ skipping 141 matching lines @@
   bool have_scroll_event_handlers_;
   EventListenerProperties event_listener_properties_[static_cast<size_t>(
       EventListenerClass::kNumClasses)];
 
   // Whether or not Blink's viewport size was shrunk by the height of the top
   // controls at the time of the last layout.
   bool browser_controls_shrink_blink_size_;
   float top_controls_height_;
   float bottom_controls_height_;
 
+  ScrollBoundaryBehavior scroll_boundary_behavior_;
+
   // The amount that the browser controls are shown from 0 (hidden) to 1 (fully
   // shown).
   scoped_refptr<SyncedBrowserControls> top_controls_shown_ratio_;
 
   std::unique_ptr<PendingPageScaleAnimation> pending_page_scale_animation_;
 
   // Tracks the lifecycle which is used for enforcing dependencies between
   // lifecycle states. See: |LayerTreeLifecycle|.
   LayerTreeLifecycle lifecycle_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(LayerTreeImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_LAYER_TREE_IMPL_H_