aura: Remove event-dispatch methods from WindowTreeHostDelegate interface.

ui/aura/root_window_host_ozone.cc

Index: ui/aura/root_window_host_ozone.cc
diff --git a/ui/aura/root_window_host_ozone.cc b/ui/aura/root_window_host_ozone.cc
index 5d17f83521d4eaca964b110d60ec10c5d142f11a..3829e11588ad05f4bba5432309e23b524b544f01 100644
--- a/ui/aura/root_window_host_ozone.cc
+++ b/ui/aura/root_window_host_ozone.cc
@@ -38,16 +38,7 @@ WindowTreeHostOzone::~WindowTreeHostOzone() {
 
 bool WindowTreeHostOzone::Dispatch(const base::NativeEvent& ne) {
   ui::Event* event = static_cast<ui::Event*>(ne);
-  if (event->IsTouchEvent()) {
-    ui::TouchEvent* touchev = static_cast<ui::TouchEvent*>(ne);
-    delegate_->OnHostTouchEvent(touchev);
-  } else if (event->IsKeyEvent()) {
-    ui::KeyEvent* keyev = static_cast<ui::KeyEvent*>(ne);
-    delegate_->OnHostKeyEvent(keyev);
-  } else if (event->IsMouseEvent()) {
-    ui::MouseEvent* mouseev = static_cast<ui::MouseEvent*>(ne);
-    delegate_->OnHostMouseEvent(mouseev);
-  }
+  SendEventToProcessor(event);
   return true;
 }