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

ui/views/corewm/focus_controller.cc

Index: ui/views/corewm/focus_controller.cc
diff --git a/ui/views/corewm/focus_controller.cc b/ui/views/corewm/focus_controller.cc
index c29638520f47ed901ea0e0a12159c02e9e9ed721..206af5e353a53e963d7e760ea07d022b9f1ed355 100644
--- a/ui/views/corewm/focus_controller.cc
+++ b/ui/views/corewm/focus_controller.cc
@@ -143,12 +143,10 @@ ui::EventResult FocusController::OnMouseEvent(ui::MouseEvent* event) {
   return ui::ER_UNHANDLED;
 }
 
-ui::EventResult FocusController::OnScrollEvent(ui::ScrollEvent* event) {
-  return ui::ER_UNHANDLED;
+void FocusController::OnScrollEvent(ui::ScrollEvent* event) {
 }
 
-ui::EventResult FocusController::OnTouchEvent(ui::TouchEvent* event) {
-  return ui::ER_UNHANDLED;
+void FocusController::OnTouchEvent(ui::TouchEvent* event) {
 }
 
 void FocusController::OnGestureEvent(ui::GestureEvent* event) {