collect windows from mru_list in workspace_controller.

ash/shelf/shelf_layout_manager_unittest.cc

Index: ash/shelf/shelf_layout_manager_unittest.cc
diff --git a/ash/shelf/shelf_layout_manager_unittest.cc b/ash/shelf/shelf_layout_manager_unittest.cc
index a6e92da075ea3c69f89dbf4acc3f81289b754832..0adc1ebbfaca8ef442ddb04d97739d48927ad013 100644
--- a/ash/shelf/shelf_layout_manager_unittest.cc
+++ b/ash/shelf/shelf_layout_manager_unittest.cc
@@ -1559,6 +1559,12 @@ TEST_F(ShelfLayoutManagerTest, AutohideShelfForAutohideWhenActiveWindow) {
       ->set_autohide_shelf_when_maximized_or_fullscreen(false);
   widget_two->Activate();
   EXPECT_EQ(SHELF_VISIBLE, shelf->GetVisibilityState());
+
+  wm::GetWindowState(window_two)
+      ->set_autohide_shelf_when_maximized_or_fullscreen(true);
+  window_two->SetProperty(aura::client::kAlwaysOnTopKey, true);

[oshima, 2017/06/30 00:04:08]

please test if the window is in the always on container.

[Muyuan, 2017/06/30 00:28:23]

Done.

+  widget_two->Maximize();
+  EXPECT_EQ(SHELF_AUTO_HIDE, shelf->GetVisibilityState());

[oshima, 2017/06/30 00:04:08]

Can you also check if the workspace state is in maximized?

[Muyuan, 2017/06/30 00:28:23]

Done.

 }
 
 TEST_F(ShelfLayoutManagerTest, ShelfFlickerOnTrayActivation) {