gfx: Make conversions from gfx::Point to PointF explicit.

ui/chromeos/touch_exploration_controller.h

Index: ui/chromeos/touch_exploration_controller.h
diff --git a/ui/chromeos/touch_exploration_controller.h b/ui/chromeos/touch_exploration_controller.h
index d023ec9ec2b4e525843c52b67e67bf775afee2af..2f2ace4d21b057ac9b301c18725b3dac0230d175 100644
--- a/ui/chromeos/touch_exploration_controller.h
+++ b/ui/chromeos/touch_exploration_controller.h
@@ -258,7 +258,7 @@ class UI_CHROMEOS_EXPORT TouchExplorationController
   // Binds DispatchKeyWithFlags to a specific key and flags.
   base::Closure BindKeyEventWithFlags(const ui::KeyboardCode key, int flags);
 
-  scoped_ptr<ui::Event> CreateMouseMoveEvent(const gfx::PointF& location,
+  scoped_ptr<ui::Event> CreateMouseMoveEvent(const gfx::Point& location,
                                              int flags);
 
   void EnterTouchToMouseMode();