Use accessibility name of the bubble widget for ChromeVox.

BUG=654913

Review-Url: https://chromiumcodereview.appspot.com/2414213003
Cr-Commit-Position: refs/heads/master@{#426884}

ui/views/bubble/tray_bubble_view.cc

@@ -427,6 +427,10 @@ void TrayBubbleView::GetWidgetHitTestMask(gfx::Path* mask) const {
   mask->addRect(gfx::RectToSkRect(GetBubbleFrameView()->GetContentsBounds()));
 }
 
+base::string16 TrayBubbleView::GetAccessibleWindowTitle() const {
+  return delegate_->GetAccessibleNameForBubble();
+}
+
 gfx::Size TrayBubbleView::GetPreferredSize() const {
   return gfx::Size(preferred_width_, GetHeightForWidth(preferred_width_));
 }

ui/views/bubble/tray_bubble_view.h

@@ -158,6 +158,7 @@ class VIEWS_EXPORT TrayBubbleView : public views::BubbleDialogDelegateView,
       views::Widget* widget) override;
   bool WidgetHasHitTestMask() const override;
   void GetWidgetHitTestMask(gfx::Path* mask) const override;
+  base::string16 GetAccessibleWindowTitle() const override;
 
   // Overridden from views::BubbleDialogDelegateView.
   gfx::Rect GetAnchorRect() const override;