Fix rtl shelf overflow bubble

ui/views/bubble/bubble_frame_view.cc

Index: ui/views/bubble/bubble_frame_view.cc
diff --git a/ui/views/bubble/bubble_frame_view.cc b/ui/views/bubble/bubble_frame_view.cc
index dbc4704b8029159c0e2285312c3e268d02e2c839..df024c6cc01aa0fab2e9a918d0a4aec18965e895 100644
--- a/ui/views/bubble/bubble_frame_view.cc
+++ b/ui/views/bubble/bubble_frame_view.cc
@@ -72,6 +72,7 @@ const char BubbleFrameView::kViewClassName[] = "BubbleFrameView";
 BubbleFrameView::BubbleFrameView(const gfx::Insets& title_margins,
                                  const gfx::Insets& content_margins)
     : bubble_border_(nullptr),
+      mirror_arrow_in_rtl_(true),
       title_margins_(title_margins),
       content_margins_(content_margins),
       title_icon_(new views::ImageView()),
@@ -120,6 +121,13 @@ LabelButton* BubbleFrameView::CreateCloseButton(ButtonListener* listener) {
 gfx::Rect BubbleFrameView::GetBoundsForClientView() const {
   gfx::Rect client_bounds = GetContentsBounds();
   client_bounds.Inset(GetInsets());
+
+  // After GetBoundsForClientView() returns, RTL code will mirror the ClientView
+  // in the bubble.  If we're not mirroring the arrow, we don't want this, so we
+  // pre-mirror here so the subsequent swap results in a no-op.
+  if (base::i18n::IsRTL() && !mirror_arrow_in_rtl_)
+    client_bounds.set_x(GetMirroredXForRect(client_bounds));
+
   if (footnote_container_) {
     client_bounds.set_height(client_bounds.height() -
                              footnote_container_->height());