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 5b4a29f339b7206b3691511520fb12729319b8f0..c3a56f684394bc4ea390d15e1fb1ffa83380db8a 100644
--- a/ui/aura/window_tree_host_ozone.cc
+++ b/ui/aura/window_tree_host_ozone.cc
@@ -18,11 +18,6 @@ WindowTreeHostOzone::WindowTreeHostOzone(const gfx::Rect& bounds)
       bounds_(bounds) {
   ui::OzonePlatform::Initialize();
 
-  // 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();