events: Change gesture-event handler in EventHandler to not return any values.

content/browser/web_contents/web_contents_view_aura.cc

Index: content/browser/web_contents/web_contents_view_aura.cc
diff --git a/content/browser/web_contents/web_contents_view_aura.cc b/content/browser/web_contents/web_contents_view_aura.cc
index c3d194cdbdf7f0c843f1fba4c0d1d0ff45d573d2..e435be39359c03d72763bd0e36471b018a366fc5 100644
--- a/content/browser/web_contents/web_contents_view_aura.cc
+++ b/content/browser/web_contents/web_contents_view_aura.cc
@@ -923,15 +923,6 @@ ui::EventResult WebContentsViewAura::OnMouseEvent(ui::MouseEvent* event) {
   return ui::ER_UNHANDLED;
 }
 
-ui::EventResult WebContentsViewAura::OnTouchEvent(ui::TouchEvent* event) {
-  return ui::ER_UNHANDLED;
-}
-
-ui::EventResult WebContentsViewAura::OnGestureEvent(
-    ui::GestureEvent* event) {
-  return ui::ER_UNHANDLED;
-}
-
 ////////////////////////////////////////////////////////////////////////////////
 // WebContentsViewAura, aura::client::DragDropDelegate implementation: