Move ash::DisplayInfo to ui

ash/display/window_tree_host_manager.h

Index: ash/display/window_tree_host_manager.h
diff --git a/ash/display/window_tree_host_manager.h b/ash/display/window_tree_host_manager.h
index c9c91f6fb818f02d955cfbca9e7485aee800bd60..29edf4dc864c6f892db52806e7e7eee3ed6ac28f 100644
--- a/ash/display/window_tree_host_manager.h
+++ b/ash/display/window_tree_host_manager.h
@@ -40,11 +40,15 @@ namespace gfx {
 class Insets;
 }
 
+namespace ui {
+class DisplayInfo;
+}
+
 namespace ash {
 class AshWindowTreeHost;
 struct AshWindowTreeHostInitParams;
 class CursorWindowController;
-class DisplayInfo;
+
 class DisplayManager;
 class FocusActivationStore;
 class InputMethodEventHandler;