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

third_party/WebKit/Source/core/input/ScrollManager.cpp

Index: third_party/WebKit/Source/core/input/ScrollManager.cpp
diff --git a/third_party/WebKit/Source/core/input/ScrollManager.cpp b/third_party/WebKit/Source/core/input/ScrollManager.cpp
index ec6c58ab46b0aeff70daf543c4fe97ad78bc7aff..96bd5fc9d5ad501ca66ffbc3bf1274e68c216d73 100644
--- a/third_party/WebKit/Source/core/input/ScrollManager.cpp
+++ b/third_party/WebKit/Source/core/input/ScrollManager.cpp
@@ -85,8 +85,8 @@ AutoscrollController* ScrollManager::GetAutoscrollController() const {
   return nullptr;
 }
 
-static bool CanPropagate(const ScrollState& scroll_state,
-                         const Element& element) {
+bool ScrollManager::CanPropagate(const ScrollState& scroll_state,
+                                 const Element& element) {
   // ScrollBoundaryBehavior may have different values on x-axis and y-axis.
   // We need to find out the dominant axis of user's intended scroll to decide
   // which node's ScrollBoundaryBehavior should be applied, i.e. which the
@@ -95,7 +95,8 @@ static bool CanPropagate(const ScrollState& scroll_state,
   // axis of scroll gesture.
   bool x_dominant =
       std::abs(scroll_state.deltaXHint()) > std::abs(scroll_state.deltaYHint());
-  return (x_dominant && element.GetComputedStyle()->ScrollBoundaryBehaviorX() ==
+  return (element == frame_->GetDocument()->ViewportDefiningElement(nullptr)) ||
+         (x_dominant && element.GetComputedStyle()->ScrollBoundaryBehaviorX() ==
                             EScrollBoundaryBehavior::kAuto) ||
          (!x_dominant &&
           element.GetComputedStyle()->ScrollBoundaryBehaviorY() ==