Promotes a handful of members from WmShell to Shell

ash/wm/overview/window_selector_unittest.cc

Index: ash/wm/overview/window_selector_unittest.cc
diff --git a/ash/wm/overview/window_selector_unittest.cc b/ash/wm/overview/window_selector_unittest.cc
index b6c6bf849c9ca5ac897d62d42455dac2bc575c2b..ed7528c40d0f92916e38664292e0150d073ceb2c 100644
--- a/ash/wm/overview/window_selector_unittest.cc
+++ b/ash/wm/overview/window_selector_unittest.cc
@@ -405,7 +405,8 @@ TEST_F(WindowSelectorTest, OverviewScreenRotation) {
 // Tests that an a11y alert is sent on entering overview mode.
 TEST_F(WindowSelectorTest, A11yAlertOnOverviewMode) {
   gfx::Rect bounds(0, 0, 400, 400);
-  AccessibilityDelegate* delegate = WmShell::Get()->accessibility_delegate();
+  AccessibilityDelegate* delegate =
+      Shell::GetInstance()->accessibility_delegate();
   std::unique_ptr<aura::Window> window1(CreateWindow(bounds));
   EXPECT_NE(delegate->GetLastAccessibilityAlert(),
             A11Y_ALERT_WINDOW_OVERVIEW_MODE_ENTERED);