[Mac] Hide bookmark bar empty view by default

chrome/browser/ui/cocoa/bookmarks/bookmark_bar_view_cocoa.mm

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_bar_view_cocoa.mm
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_view_cocoa.mm b/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_view_cocoa.mm
index 3aaa4754f88c43c945e63f623fa39f3244947001..b9e788cf132834058f1f08ac2ba96f15cc6eac51 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_view_cocoa.mm
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_view_cocoa.mm
@@ -108,6 +108,11 @@ static const CGFloat kTextFieldTrailingPadding = 5;
     [importBookmarksButton_ setFont:smallSystemFont];
     [importBookmarksButton_ sizeToFit];
 
+    // Hide by default so these don't flash if it takes a while for the bookmark
+    // model to load.
+    [noItemTextField_ setHidden:YES];
+    [importBookmarksButton_ setHidden:YES];
+
     [self addSubview:noItemTextField_];
     [self addSubview:importBookmarksButton_];
     [self registerForNotificationsAndDraggedTypes];