MacViews: Implement Tab Dragging

ui/base/test/ui_controls.h

Index: ui/base/test/ui_controls.h
diff --git a/ui/base/test/ui_controls.h b/ui/base/test/ui_controls.h
index e54f936ce25e082c4db90fb0e9a162b02bb365cd..64d0ee084fd53f5b83fa97817377de4407d56ede 100644
--- a/ui/base/test/ui_controls.h
+++ b/ui/base/test/ui_controls.h
@@ -102,6 +102,15 @@ void InstallUIControlsAura(UIControlsAura* instance);
 // to traverse to the desired item; because the application is configured to
 // traverse more elements for accessibility reasons.
 bool IsFullKeyboardAccessEnabled();
+
+// When |enable_cgevents| is true, all simulated mouse events will be posted to
+// the WindowServer, and the actual mouse will move on the screen.
+void SetSendMouseEventsAsCGEvents(bool enable_cgevents);
+bool SendMouseEventsAsCGEvents();
+
+// Invokes |task| when an application starts processing an event that matches
+// |event|.
+void NotifyWhenEventIsProcessed(NSEvent* event, const base::Closure& task);
 #endif
 
 }  // namespace ui_controls