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

chrome/browser/ui/views/immersive_mode_controller.cc

Index: chrome/browser/ui/views/immersive_mode_controller.cc
diff --git a/chrome/browser/ui/views/immersive_mode_controller.cc b/chrome/browser/ui/views/immersive_mode_controller.cc
index c92e9a654180882e05c10c430bf845dc836429d6..59bc7cf9ee960394a2042b0ae4951dcc9b610a59 100644
--- a/chrome/browser/ui/views/immersive_mode_controller.cc
+++ b/chrome/browser/ui/views/immersive_mode_controller.cc
@@ -164,10 +164,6 @@ void ImmersiveModeController::SetEnabled(bool enabled) {
 }
 
 // ui::EventHandler overrides:
-ui::EventResult ImmersiveModeController::OnKeyEvent(ui::KeyEvent* event) {
-  return ui::ER_UNHANDLED;
-}
-
 ui::EventResult ImmersiveModeController::OnMouseEvent(ui::MouseEvent* event) {
   if (event->type() != ui::ET_MOUSE_MOVED)
     return ui::ER_UNHANDLED;
@@ -186,19 +182,6 @@ ui::EventResult ImmersiveModeController::OnMouseEvent(ui::MouseEvent* event) {
   return ui::ER_UNHANDLED;
 }
 
-ui::EventResult ImmersiveModeController::OnScrollEvent(ui::ScrollEvent* event) {
-  return ui::ER_UNHANDLED;
-}
-
-ui::EventResult ImmersiveModeController::OnTouchEvent(ui::TouchEvent* event) {
-  return ui::ER_UNHANDLED;
-}
-
-ui::EventResult ImmersiveModeController::OnGestureEvent(
-    ui::GestureEvent* event) {
-  return ui::ER_UNHANDLED;
-}
-
 // views::MouseWatcherListener overrides:
 void ImmersiveModeController::MouseMovedOutOfHost() {
   EndReveal(true);