collect windows from mru_list in workspace_controller.

ash/app_list/app_list_presenter_delegate.cc

Index: ash/app_list/app_list_presenter_delegate.cc
diff --git a/ash/app_list/app_list_presenter_delegate.cc b/ash/app_list/app_list_presenter_delegate.cc
index 23e902f821671a855f6be6822da0071affbeecc0..adf17f40d7223d542f18690875554491518fd8e0 100644
--- a/ash/app_list/app_list_presenter_delegate.cc
+++ b/ash/app_list/app_list_presenter_delegate.cc
@@ -15,6 +15,7 @@
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "ash/wm/maximize_mode/maximize_mode_controller.h"
+#include "ash/wm/window_state.h"
 #include "base/command_line.h"
 #include "ui/app_list/app_list_constants.h"
 #include "ui/app_list/app_list_features.h"
@@ -119,6 +120,9 @@ void AppListPresenterDelegate::Init(app_list::AppListView* view,
   if (!app_list::features::IsFullscreenAppListEnabled()) {
     view->MaybeSetAnchorPoint(GetCenterOfDisplayForWindow(
         root_window, GetMinimumBoundsHeightForAppList(view)));
+  } else {
+    wm::GetWindowState(view->GetWidget()->GetNativeWindow())
+        ->set_ignored_by_shelf(!IsSideShelf(root_window));

[oshima, 2017/07/13 00:21:54]

we should always set this to true, to keep the same behavior even for current
app list.

[Muyuan, 2017/07/13 01:41:41]

Done.

   }
   keyboard::KeyboardController* keyboard_controller =
       keyboard::KeyboardController::GetInstance();