Show tooltips for nested folders in the bookmark bar.

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

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.mm
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.mm b/chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.mm
index 0a14142b6b22c3c5c750250f10399ed730cea0d0..5ce7822c5376a74408831c7265a243f6205de9f6 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.mm
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_menu_cocoa_controller.mm
@@ -43,6 +43,8 @@ const NSUInteger kMaximumMenuPixelsWide = 300;
 
 + (NSString*)tooltipForNode:(const BookmarkNode*)node {
   NSString* title = base::SysUTF16ToNSString(node->GetTitle());
+  if (node->is_folder())
+    return title;
   std::string urlString = node->url().possibly_invalid_spec();
   NSString* url = base::SysUTF8ToNSString(urlString);
   return cocoa_l10n_util::TooltipForURLAndTitle(url, title);