Handles users rotating screen too early

ash/test/shell_test_api.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_TEST_SHELL_TEST_API_H_
 #define ASH_TEST_SHELL_TEST_API_H_
 
+#include <stdint.h>
+
 #include "base/macros.h"
 
 namespace ash {
 class AshNativeCursorManager;
 class DragDropController;
 class MaximizeModeWindowManager;
 class SessionStateDelegate;
 class ScreenPositionController;
 class Shell;
 class SystemGestureEventFilter;
 class WorkspaceController;
+class ScreenRotationAnimator;
 
 namespace test {
 
 // Accesses private data from a Shell for testing.
 class ShellTestApi {
  public:
   explicit ShellTestApi(Shell* shell);
 
   SystemGestureEventFilter* system_gesture_event_filter();
   WorkspaceController* workspace_controller();
   ScreenPositionController* screen_position_controller();
   AshNativeCursorManager* ash_native_cursor_manager();
   DragDropController* drag_drop_controller();
   MaximizeModeWindowManager* maximize_mode_window_manager();
   void DisableDisplayAnimator();
+  ScreenRotationAnimator* GetOrMakeAnimatorByDisplayId(int64_t display_id);

[bruthig, 2017/03/02 18:25:45]

I think it makes more sense to put these in a
DisplayConfigurationControllerTestApi instead.  The ShellTestApi will become a
huge monolithic class if it has accessors to small details within each service
that it owns.

[wutao, 2017/03/03 02:45:52]

Done. Also revised the old test when to access
DisplayConfigurationController::ResetAnimatorForTest().

+  int DisplayIdAnimatorMapSize();
 
   // Set SessionStateDelegate.
   void SetSessionStateDelegate(SessionStateDelegate* session_state_delegate);
 
  private:
   Shell* shell_;  // not owned
 
   DISALLOW_COPY_AND_ASSIGN(ShellTestApi);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_SHELL_TEST_API_H_