Remove ShouldBlockShelfAutoHide().

ui/views/bubble/tray_bubble_view.cc

Index: ui/views/bubble/tray_bubble_view.cc
diff --git a/ui/views/bubble/tray_bubble_view.cc b/ui/views/bubble/tray_bubble_view.cc
index 3d7a93eecae09d4b4d6f03ab71aef2e27a33c54c..70da63a0acd92803fe9ac65be64b6202140fc842 100644
--- a/ui/views/bubble/tray_bubble_view.cc
+++ b/ui/views/bubble/tray_bubble_view.cc
@@ -49,6 +49,10 @@ BubbleBorder::Arrow GetArrowAlignment(
   return BubbleBorder::RIGHT_BOTTOM;
 }
 
+// Only one TrayBubbleView is visible at a time, but there are cases where the
+// lifetimes of two different bubbles can overlap briefly.
+int g_current_tray_bubble_showing_count_ = 0;
+
 }  // namespace
 
 namespace internal {
@@ -225,6 +229,11 @@ TrayBubbleView::~TrayBubbleView() {
     delegate_->BubbleViewDestroyed();
 }
 
+// static
+bool TrayBubbleView::IsATrayBubbleOpen() {
+  return g_current_tray_bubble_showing_count_ > 0;
+}
+
 void TrayBubbleView::InitializeAndShowBubble() {
   layer()->parent()->SetMaskLayer(bubble_content_mask_->layer());
 
@@ -232,6 +241,8 @@ void TrayBubbleView::InitializeAndShowBubble() {
   GetWidget()->GetNativeWindow()->SetEventTargeter(
       std::unique_ptr<ui::EventTargeter>(new BubbleWindowTargeter(this)));
   UpdateBubble();
+
+  ++g_current_tray_bubble_showing_count_;
 }
 
 void TrayBubbleView::UpdateBubble() {
@@ -278,6 +289,12 @@ void TrayBubbleView::OnBeforeBubbleWidgetInit(Widget::InitParams* params,
   params->shadow_elevation = wm::ShadowElevation::LARGE;
 }
 
+void TrayBubbleView::OnWidgetClosing(Widget* widget) {
+  BubbleDialogDelegateView::OnWidgetClosing(widget);
+  --g_current_tray_bubble_showing_count_;
+  DCHECK_GE(g_current_tray_bubble_showing_count_, 0);
+}
+
 NonClientFrameView* TrayBubbleView::CreateNonClientFrameView(Widget* widget) {
   BubbleFrameView* frame = static_cast<BubbleFrameView*>(
       BubbleDialogDelegateView::CreateNonClientFrameView(widget));