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

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

Index: third_party/WebKit/Source/core/dom/Document.cpp
diff --git a/third_party/WebKit/Source/core/dom/Document.cpp b/third_party/WebKit/Source/core/dom/Document.cpp
index 3d1d8c156dea95fb3f0e265d4764c7a7e405806a..fff48c235e1ccde663663c406023bda44526daae 100644
--- a/third_party/WebKit/Source/core/dom/Document.cpp
+++ b/third_party/WebKit/Source/core/dom/Document.cpp
@@ -203,6 +203,7 @@
 #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"
@@ -1950,6 +1951,20 @@ void Document::PropagateStyleToViewport() {
   }
 
   ScrollSnapType snap_type = overflow_style->GetScrollSnapType();
+  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),

[dtapuska, 2017/08/22 14:51:04]

Is there someone where asserting that the CSS cast to the
ScrollBoundaryBehaviorType is the same?

[sunyunjia, 2017/08/22 23:55:37]

Yes see
https://cs.chromium.org/chromium/src/third_party/WebKit/Source/core/style/Com...

+            static_cast<ScrollBoundaryBehaviorType>(
+                scroll_boundary_behavior_y)));
+  }
 
   RefPtr<ComputedStyle> viewport_style = GetLayoutViewItem().MutableStyle();
   if (viewport_style->GetWritingMode() != root_writing_mode ||
@@ -1962,7 +1977,9 @@ void Document::PropagateStyleToViewport() {
       viewport_style->OverflowX() != overflow_x ||
       viewport_style->OverflowY() != overflow_y ||
       viewport_style->ColumnGap() != column_gap ||
-      viewport_style->GetScrollSnapType() != snap_type) {
+      viewport_style->GetScrollSnapType() != snap_type ||
+      viewport_style->ScrollBoundaryBehaviorX() != scroll_boundary_behavior_x ||
+      viewport_style->ScrollBoundaryBehaviorY() != scroll_boundary_behavior_y) {
     RefPtr<ComputedStyle> new_style = ComputedStyle::Clone(*viewport_style);
     new_style->SetWritingMode(root_writing_mode);
     new_style->SetDirection(root_direction);
@@ -1974,6 +1991,8 @@ void Document::PropagateStyleToViewport() {
     new_style->SetOverflowY(overflow_y);
     new_style->SetColumnGap(column_gap);
     new_style->SetScrollSnapType(snap_type);
+    new_style->SetScrollBoundaryBehaviorX(scroll_boundary_behavior_x);
+    new_style->SetScrollBoundaryBehaviorY(scroll_boundary_behavior_y);
     GetLayoutViewItem().SetStyle(new_style);
     SetupFontBuilder(*new_style);
   }