Convert Aura to use ui::Event.

ui/views/widget/tooltip_manager_aura.cc

Index: ui/views/widget/tooltip_manager_aura.cc
===================================================================
--- ui/views/widget/tooltip_manager_aura.cc	(revision 150582)
+++ ui/views/widget/tooltip_manager_aura.cc	(working copy)
@@ -55,7 +55,7 @@
   aura::RootWindow* root_window = window->GetRootWindow();
   if (aura::client::GetTooltipClient(root_window)) {
     gfx::Point view_point = root_window->GetLastMouseLocationInRoot();
-    aura::Window::ConvertPointToWindow(root_window, window, &view_point);
+    aura::Window::ConvertPointToTarget(root_window, window, &view_point);
     View* view = GetViewUnderPoint(view_point);
     if (view) {
       View::ConvertPointFromWidget(view, &view_point);
@@ -73,7 +73,7 @@
   aura::RootWindow* root_window = window->GetRootWindow();
   if (aura::client::GetTooltipClient(root_window)) {
     gfx::Point view_point = root_window->GetLastMouseLocationInRoot();
-    aura::Window::ConvertPointToWindow(root_window, window, &view_point);
+    aura::Window::ConvertPointToTarget(root_window, window, &view_point);
     View* target = GetViewUnderPoint(view_point);
     if (target != view)
       return;