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

third_party/WebKit/Source/core/dom/Document.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2011, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2008, 2009, 2011, 2012 Google Inc. All rights reserved.
@@ skipping 186 matching lines @@
 #include "core/loader/PrerendererClient.h"
 #include "core/loader/TextResourceDecoderBuilder.h"
 #include "core/loader/appcache/ApplicationCacheHost.h"
 #include "core/origin_trials/OriginTrials.h"
 #include "core/page/ChromeClient.h"
 #include "core/page/EventWithHitTestResults.h"
 #include "core/page/FocusController.h"
 #include "core/page/FrameTree.h"
 #include "core/page/Page.h"
 #include "core/page/PointerLockController.h"
+#include "core/page/scrolling/OverscrollController.h"
 #include "core/page/scrolling/RootScrollerController.h"
 #include "core/page/scrolling/ScrollStateCallback.h"
 #include "core/page/scrolling/ScrollingCoordinator.h"
 #include "core/page/scrolling/SnapCoordinator.h"
 #include "core/page/scrolling/TopDocumentRootScrollerController.h"
 #include "core/paint/compositing/PaintLayerCompositor.h"
 #include "core/probe/CoreProbes.h"
 #include "core/resize_observer/ResizeObserverController.h"
 #include "core/svg/SVGDocumentExtensions.h"
 #include "core/svg/SVGScriptElement.h"
@@ skipping 1794 matching lines @@
     // propagate it too.
     if (!overflow_style->HasNormalColumnGap()) {
       column_gap_normal = false;
       column_gap = overflow_style->ColumnGap();
     }
   }
 
   ScrollSnapType snap_type = overflow_style->GetScrollSnapType();
   ScrollBehavior scroll_behavior = document_element_style->GetScrollBehavior();
 
+  EScrollBoundaryBehavior scroll_boundary_behavior_x =
+      overflow_style->ScrollBoundaryBehaviorX();
+  EScrollBoundaryBehavior scroll_boundary_behavior_y =
+      overflow_style->ScrollBoundaryBehaviorY();
+  using ScrollBoundaryBehaviorType =
+      WebScrollBoundaryBehavior::ScrollBoundaryBehaviorType;
+  if (RuntimeEnabledFeatures::CSSScrollBoundaryBehaviorEnabled() &&
+      IsInMainFrame()) {
+    GetPage()->GetOverscrollController().SetScrollBoundaryBehavior(
+        WebScrollBoundaryBehavior(
+            static_cast<ScrollBoundaryBehaviorType>(scroll_boundary_behavior_x),
+            static_cast<ScrollBoundaryBehaviorType>(
+                scroll_boundary_behavior_y)));
+  }
+
   RefPtr<ComputedStyle> viewport_style;
   if (change == kForce || !GetLayoutViewItem().Style()) {
     viewport_style = StyleResolver::StyleForViewport(*this);
   } else {
     const ComputedStyle& old_style = GetLayoutViewItem().StyleRef();
     if (old_style.GetWritingMode() == root_writing_mode &&
         old_style.Direction() == root_direction &&
         old_style.VisitedDependentColor(CSSPropertyBackgroundColor) ==
             background_color &&
         old_style.BackgroundLayers() == background_layers &&
         old_style.ImageRendering() == image_rendering &&
         old_style.OverflowAnchor() == overflow_anchor &&
         old_style.OverflowX() == overflow_x &&
         old_style.OverflowY() == overflow_y &&
         old_style.HasNormalColumnGap() == column_gap_normal &&
         old_style.ColumnGap() == column_gap &&
         old_style.GetScrollSnapType() == snap_type &&
-        old_style.GetScrollBehavior() == scroll_behavior) {
+        old_style.GetScrollBehavior() == scroll_behavior &&
+        old_style.ScrollBoundaryBehaviorX() == scroll_boundary_behavior_x &&
+        old_style.ScrollBoundaryBehaviorY() == scroll_boundary_behavior_y) {
       return;
     }
     viewport_style = ComputedStyle::Clone(old_style);
   }
   viewport_style->SetWritingMode(root_writing_mode);
   viewport_style->SetDirection(root_direction);
   viewport_style->SetBackgroundColor(background_color);
   viewport_style->AccessBackgroundLayers() = background_layers;
   viewport_style->SetImageRendering(image_rendering);
   viewport_style->SetOverflowAnchor(overflow_anchor);
   viewport_style->SetOverflowX(overflow_x);
   viewport_style->SetOverflowY(overflow_y);
   if (column_gap_normal)
     viewport_style->SetHasNormalColumnGap();
   else
     viewport_style->SetColumnGap(column_gap);
   viewport_style->SetScrollSnapType(snap_type);
   viewport_style->SetScrollBehavior(scroll_behavior);
+  viewport_style->SetScrollBoundaryBehaviorX(scroll_boundary_behavior_x);
+  viewport_style->SetScrollBoundaryBehaviorY(scroll_boundary_behavior_y);
   GetLayoutViewItem().SetStyle(viewport_style);
   SetupFontBuilder(*viewport_style);
 }
 
 #if DCHECK_IS_ON()
 static void AssertLayoutTreeUpdated(Node& root) {
   for (Node& node : NodeTraversal::InclusiveDescendantsOf(root)) {
     // We leave some nodes with dirty bits in the tree because they don't
     // matter like Comment and ProcessingInstruction nodes.
     // TODO(esprehn): Don't even mark those nodes as needing recalcs in the
@@ skipping 4982 matching lines @@
 }
 
 void showLiveDocumentInstances() {
   WeakDocumentSet& set = liveDocumentSet();
   fprintf(stderr, "There are %u documents currently alive:\n", set.size());
   for (blink::Document* document : set)
     fprintf(stderr, "- Document %p URL: %s\n", document,
             document->Url().GetString().Utf8().data());
 }
 #endif