Fix namespace for src/ui/display/.

ui/display/test/test_screen.h

Index: ui/display/test/test_screen.h
diff --git a/ui/display/test/test_screen.h b/ui/display/test/test_screen.h
index ffde93753c79c6cdbcb2dc9c7f72ac7817382aac..5672e7d0ae1dd76003d7a328bbefbd1bc83c1dde 100644
--- a/ui/display/test/test_screen.h
+++ b/ui/display/test/test_screen.h
@@ -14,18 +14,18 @@
 namespace display {
 namespace test {
 
-// A dummy implementation of display::Screen that contains a single
-// display::Display only. The contained Display can be accessed and modified via
+// A dummy implementation of Screen that contains a single
+// Display only. The contained Display can be accessed and modified via
 // TestScreen::display().
 //
-// NOTE: Adding and removing display::DisplayOberver's are no-ops and observers
+// NOTE: Adding and removing DisplayOberver's are no-ops and observers
 // will NOT be notified ever.
 class TestScreen : public ScreenBase {
  public:
   TestScreen();
   ~TestScreen() override;
 
-  // display::Screen:
+  // Screen:
   gfx::Point GetCursorScreenPoint() override;
   bool IsWindowUnderCursor(gfx::NativeWindow window) override;
   gfx::NativeWindow GetWindowAtScreenPoint(const gfx::Point& point) override;