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

third_party/WebKit/Source/core/page/ChromeClient.h

Index: third_party/WebKit/Source/core/page/ChromeClient.h
diff --git a/third_party/WebKit/Source/core/page/ChromeClient.h b/third_party/WebKit/Source/core/page/ChromeClient.h
index 9ef95882db8a878371a98a68f9450c82206fd382..154afdbdf235b10b84dc0a113e5a80fa36543dc1 100644
--- a/third_party/WebKit/Source/core/page/ChromeClient.h
+++ b/third_party/WebKit/Source/core/page/ChromeClient.h
@@ -45,6 +45,7 @@
 #include "public/platform/WebDragOperation.h"
 #include "public/platform/WebEventListenerProperties.h"
 #include "public/platform/WebFocusType.h"
+#include "public/platform/WebScrollBoundaryBehavior.h"
 
 // To avoid conflicts with the CreateWindow macro from the Windows SDK...
 #undef CreateWindow
@@ -143,7 +144,8 @@ class CORE_EXPORT ChromeClient : public PlatformChromeClient {
   virtual void DidOverscroll(const FloatSize& overscroll_delta,
                              const FloatSize& accumulated_overscroll,
                              const FloatPoint& position_in_viewport,
-                             const FloatSize& velocity_in_viewport) = 0;
+                             const FloatSize& velocity_in_viewport,
+                             const WebScrollBoundaryBehavior&) = 0;
 
   virtual void SetToolbarsVisible(bool) = 0;
   virtual bool ToolbarsVisible() = 0;
@@ -333,6 +335,8 @@ class CORE_EXPORT ChromeClient : public PlatformChromeClient {
 
   virtual void DidUpdateBrowserControls() const {}
 
+  virtual void SetScrollBoundaryBehavior(WebScrollBoundaryBehavior) const {}
+
   virtual void RegisterPopupOpeningObserver(PopupOpeningObserver*) = 0;
   virtual void UnregisterPopupOpeningObserver(PopupOpeningObserver*) = 0;
   virtual void NotifyPopupOpeningObservers() const = 0;