Handles users rotating screen too early

ash/test/shell_test_api.h

Index: ash/test/shell_test_api.h
diff --git a/ash/test/shell_test_api.h b/ash/test/shell_test_api.h
index 236258be2eb7f6e536b58dadf77ab8bf8be2762b..929fabba4684b36d10bdd24abd671f6231677263 100644
--- a/ash/test/shell_test_api.h
+++ b/ash/test/shell_test_api.h
@@ -5,6 +5,8 @@
 #ifndef ASH_TEST_SHELL_TEST_API_H_
 #define ASH_TEST_SHELL_TEST_API_H_
 
+#include <stdint.h>
+
 #include "base/macros.h"
 
 namespace ash {
@@ -16,6 +18,7 @@ class ScreenPositionController;
 class Shell;
 class SystemGestureEventFilter;
 class WorkspaceController;
+class ScreenRotationAnimator;
 
 namespace test {
 
@@ -31,6 +34,8 @@ class ShellTestApi {
   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);