Fix Aura tooltip sizing and layout.

ui/views/corewm/tooltip_aura.h

Index: ui/views/corewm/tooltip_aura.h
diff --git a/ui/views/corewm/tooltip_aura.h b/ui/views/corewm/tooltip_aura.h
index ead119f5d95889c4a1e2e5fc1a5f72f4d807ef4c..9e8c5fa2b399d43511b3033d97f1b26d71611f3e 100644
--- a/ui/views/corewm/tooltip_aura.h
+++ b/ui/views/corewm/tooltip_aura.h
@@ -43,8 +43,7 @@ class VIEWS_EXPORT TooltipAura : public Tooltip, public WidgetObserver {
   // Adjusts the bounds given by the arguments to fit inside the desktop
   // and applies the adjusted bounds to the label_.
   void SetTooltipBounds(const gfx::Point& mouse_pos,
-                        int tooltip_width,
-                        int tooltip_height);
+                        const gfx::Size& tooltip_size);
 
   // Destroys |widget_|.
   void DestroyWidget();