Test delegate_ in TrayBubbleView::GetAccessibleState

BUG=249846
R=msw@chromium.org

Review URL: https://codereview.chromium.org/17045003

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@207890 0039d316-1c4b-4281-b951-d872f2087c98

ui/views/bubble/tray_bubble_view.cc

@@ -396,7 +396,7 @@ void TrayBubbleView::OnMouseExited(const ui::MouseEvent& event) {
 }
 
 void TrayBubbleView::GetAccessibleState(ui::AccessibleViewState* state) {
-  if (params_.can_activate) {
+  if (delegate_ && params_.can_activate) {
     state->role = ui::AccessibilityTypes::ROLE_WINDOW;
     state->name = delegate_->GetAccessibleNameForBubble();
   }