Rename RootWindowHost* to WindowTreeHost*

ui/views/widget/widget_unittest.cc

Index: ui/views/widget/widget_unittest.cc
diff --git a/ui/views/widget/widget_unittest.cc b/ui/views/widget/widget_unittest.cc
index 4196da64d6acfa71743490e6e0ac57bc2fb1755d..3bd263563121ef846837ea70256d96b18d9756cf 100644
--- a/ui/views/widget/widget_unittest.cc
+++ b/ui/views/widget/widget_unittest.cc
@@ -1291,8 +1291,8 @@ void GenerateMouseEvents(Widget* widget, ui::EventType last_event_type) {
   const gfx::Rect screen_bounds(widget->GetWindowBoundsInScreen());
   ui::MouseEvent move_event(ui::ET_MOUSE_MOVED, screen_bounds.CenterPoint(),
                             screen_bounds.CenterPoint(), 0, 0);
-  aura::RootWindowHostDelegate* rwhd =
-      widget->GetNativeWindow()->GetDispatcher()->AsRootWindowHostDelegate();
+  aura::WindowTreeHostDelegate* rwhd =
+      widget->GetNativeWindow()->GetDispatcher()->AsWindowTreeHostDelegate();
   rwhd->OnHostMouseEvent(&move_event);
   if (last_event_type == ui::ET_MOUSE_ENTERED)
     return;
@@ -2055,7 +2055,7 @@ TEST_F(WidgetTest, WindowMouseModalityTest) {
                            ui::EF_NONE,
                            ui::EF_NONE);
   top_level_widget.GetNativeView()->GetDispatcher()->
-      AsRootWindowHostDelegate()->OnHostMouseEvent(&move_main);
+      AsWindowTreeHostDelegate()->OnHostMouseEvent(&move_main);
 
   EXPECT_EQ(1, widget_view->GetEventCount(ui::ET_MOUSE_ENTERED));
   widget_view->ResetCounts();
@@ -2082,7 +2082,7 @@ TEST_F(WidgetTest, WindowMouseModalityTest) {
                                    ui::EF_NONE,
                                    ui::EF_NONE);
   top_level_widget.GetNativeView()->GetDispatcher()->
-      AsRootWindowHostDelegate()->OnHostMouseEvent(&mouse_down_dialog);
+      AsWindowTreeHostDelegate()->OnHostMouseEvent(&mouse_down_dialog);
   EXPECT_EQ(1, dialog_widget_view->GetEventCount(ui::ET_MOUSE_PRESSED));
 
   // Send a mouse move message to the main window. It should not be received by
@@ -2094,7 +2094,7 @@ TEST_F(WidgetTest, WindowMouseModalityTest) {
                                  ui::EF_NONE,
                                  ui::EF_NONE);
   top_level_widget.GetNativeView()->GetDispatcher()->
-      AsRootWindowHostDelegate()->OnHostMouseEvent(&mouse_down_main);
+      AsWindowTreeHostDelegate()->OnHostMouseEvent(&mouse_down_main);
   EXPECT_EQ(0, widget_view->GetEventCount(ui::ET_MOUSE_MOVED));
 
   modal_dialog_widget->CloseNow();