Move AccessibilityDelegate ownership to ash::WmShell

ash/accelerators/accelerator_controller_unittest.cc

Index: ash/accelerators/accelerator_controller_unittest.cc
diff --git a/ash/accelerators/accelerator_controller_unittest.cc b/ash/accelerators/accelerator_controller_unittest.cc
index 88bd52a54a4553d259c5dd9430c2c9d3d52a8684..452a4f79e2d495da8474072d79856faad6df10df 100644
--- a/ash/accelerators/accelerator_controller_unittest.cc
+++ b/ash/accelerators/accelerator_controller_unittest.cc
@@ -953,7 +953,7 @@ TEST_F(AcceleratorControllerTest, GlobalAccelerators) {
 }
 
 TEST_F(AcceleratorControllerTest, GlobalAcceleratorsToggleAppList) {
-  AccessibilityDelegate* delegate = WmShell::Get()->GetAccessibilityDelegate();
+  AccessibilityDelegate* delegate = WmShell::Get()->accessibility_delegate();
   EXPECT_FALSE(Shell::GetInstance()->GetAppListTargetVisibility());
 
   // The press event should not open the AppList, the release should instead.
@@ -1283,7 +1283,7 @@ TEST_F(AcceleratorControllerTest, DisallowedAtModalWindow) {
 #endif
 
 TEST_F(AcceleratorControllerTest, DisallowedWithNoWindow) {
-  AccessibilityDelegate* delegate = WmShell::Get()->GetAccessibilityDelegate();
+  AccessibilityDelegate* delegate = WmShell::Get()->accessibility_delegate();
 
   for (size_t i = 0; i < kActionsNeedingWindowLength; ++i) {
     delegate->TriggerAccessibilityAlert(A11Y_ALERT_NONE);