events: Update scroll and touch handlers to not return EventResult.

ui/views/view.cc

Index: ui/views/view.cc
diff --git a/ui/views/view.cc b/ui/views/view.cc
index ba0023c224b7b92633d0376fe230cd495b95310b..2fb4fdff9750be17cc633b3f53323d374e9f4d18 100644
--- a/ui/views/view.cc
+++ b/ui/views/view.cc
@@ -875,12 +875,10 @@ ui::EventResult View::OnMouseEvent(ui::MouseEvent* event) {
   return ui::ER_UNHANDLED;
 }
 
-ui::EventResult View::OnScrollEvent(ui::ScrollEvent* event) {
-  return ui::ER_UNHANDLED;
+void View::OnScrollEvent(ui::ScrollEvent* event) {
 }
 
-ui::EventResult View::OnTouchEvent(ui::TouchEvent* event) {
-  return ui::ER_UNHANDLED;
+void View::OnTouchEvent(ui::TouchEvent* event) {
 }
 
 void View::OnGestureEvent(ui::GestureEvent* event) {
@@ -1994,8 +1992,8 @@ void View::ProcessMouseReleased(const ui::MouseEvent& event) {
   // WARNING: we may have been deleted.
 }
 
-ui::EventResult View::ProcessTouchEvent(ui::TouchEvent* event) {
-  return OnTouchEvent(event);
+void View::ProcessTouchEvent(ui::TouchEvent* event) {
+  OnTouchEvent(event);
 }
 
 void View::ProcessGestureEvent(ui::GestureEvent* event) {