ozone: Remove the explicit call to start listening for events.

ui/aura/window_tree_host_ozone.cc

Index: ui/aura/window_tree_host_ozone.cc
diff --git a/ui/aura/window_tree_host_ozone.cc b/ui/aura/window_tree_host_ozone.cc
index 2251eb36c290c6a28bcf0dd0869077405be175fd..5b8be534b98dbfcf65f5677730dd2c29858cd717 100644
--- a/ui/aura/window_tree_host_ozone.cc
+++ b/ui/aura/window_tree_host_ozone.cc
@@ -15,11 +15,6 @@ namespace aura {
 WindowTreeHostOzone::WindowTreeHostOzone(const gfx::Rect& bounds)
     : widget_(0),
       bounds_(bounds) {
-  // EventFactoryOzone creates converters that obtain input events from the
-  // underlying input system and dispatch them as |ui::Event| instances into
-  // Aura.
-  ui::EventFactoryOzone::GetInstance()->StartProcessingEvents();
-
   gfx::SurfaceFactoryOzone* surface_factory =
       gfx::SurfaceFactoryOzone::GetInstance();
   widget_ = surface_factory->GetAcceleratedWidget();