Remove unnecessary display:: namespaces.

ui/display/test/display_manager_test_api.h

Index: ui/display/test/display_manager_test_api.h
diff --git a/ui/display/test/display_manager_test_api.h b/ui/display/test/display_manager_test_api.h
index feb5efc4ab62c3865672d3d146a2c150de79ed24..e774ad9b4f529b051f8cbd144710e5ca075f7d0e 100644
--- a/ui/display/test/display_manager_test_api.h
+++ b/ui/display/test/display_manager_test_api.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef UI_DISPLAY_TEST_MANAGER_TEST_API_H_
-#define UI_DISPLAY_TEST_MANAGER_TEST_API_H_
+#ifndef UI_DISPLAY_TEST_DISPLAY_MANAGER_TEST_API_H_
+#define UI_DISPLAY_TEST_DISPLAY_MANAGER_TEST_API_H_
 
 #include <stdint.h>
 
@@ -49,9 +49,8 @@ class DISPLAY_EXPORT DisplayManagerTestApi {
       int64_t display_id,
       const std::vector<ui::ColorCalibrationProfile>& profiles);
 
-  // Gets the internal display::ManagedDisplayInfo for a specific display id.
-  const display::ManagedDisplayInfo& GetInternalManagedDisplayInfo(
-      int64_t display_id);
+  // Gets the internal ManagedDisplayInfo for a specific display id.
+  const ManagedDisplayInfo& GetInternalManagedDisplayInfo(int64_t display_id);
 
   // Sets the UI scale for the |display_id|. Returns false if the
   // display_id is not an internal display.
@@ -96,17 +95,16 @@ DISPLAY_EXPORT bool SetDisplayResolution(DisplayManager* display_manager,
 // independent of current displays, use DisplayLayoutBuilder or simply
 // create a new DisplayLayout and set display id fields (primary, ids
 // in placement) manually.
-DISPLAY_EXPORT std::unique_ptr<display::DisplayLayout> CreateDisplayLayout(
+DISPLAY_EXPORT std::unique_ptr<DisplayLayout> CreateDisplayLayout(
     DisplayManager* display_manager,
-    display::DisplayPlacement::Position position,
+    DisplayPlacement::Position position,
     int offset);
 
 // Creates the DisplayIdList from ints.
-DISPLAY_EXPORT display::DisplayIdList CreateDisplayIdList2(int64_t id1,
-                                                           int64_t id2);
-DISPLAY_EXPORT display::DisplayIdList CreateDisplayIdListN(size_t count, ...);
+DISPLAY_EXPORT DisplayIdList CreateDisplayIdList2(int64_t id1, int64_t id2);
+DISPLAY_EXPORT DisplayIdList CreateDisplayIdListN(size_t count, ...);
 
 }  // namespace test
 }  // namespace display
 
-#endif  // UI_DISPLAY_TEST_MANAGER_TEST_API_H_
+#endif  // UI_DISPLAY_TEST_DISPLAY_MANAGER_TEST_API_H_