Bookmarks bar, tooltip should be seen only for folders with big names on macOS.

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

Index: chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.mm
diff --git a/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.mm b/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.mm
index 98e0acb74b961e19853be7680ff089ded27df5a5..6f411fa3e9b6b3709954508f6e3878805a07e685 100644
--- a/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.mm
+++ b/chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.mm
@@ -449,7 +449,16 @@ - (BookmarkButton*)makeButtonForNode:(const BookmarkNode*)node
       [button setAcceptsTrackIn:YES];
     }
     // Add a tooltip.
-    [button setToolTip:[BookmarkMenuCocoaController tooltipForNode:node]];
+    if (node->is_folder()) {
+      NSString* title = base::SysUTF16ToNSString(node->GetTitle());
+      if ([title length] &&
+          [[button cell] cellSize].width >
+              bookmarks::kBookmarkMenuButtonMaximumWidth) {
+        [button setToolTip:[BookmarkMenuCocoaController tooltipForNode:node]];
+      }
+    } else {
+      [button setToolTip:[BookmarkMenuCocoaController tooltipForNode:node]];
+    }
   } else {
     [button setEnabled:NO];
     [button setBordered:NO];