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

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

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #import "chrome/browser/ui/cocoa/bookmarks/bookmark_bar_folder_controller.h"
 
 #include <stddef.h>
 
 #include "base/mac/bundle_locations.h"
 #include "base/mac/sdk_forward_declarations.h"
@@ skipping 431 matching lines @@
     if (node->is_folder()) {
       [button setTarget:self];
       [button setAction:@selector(openBookmarkFolderFromButton:)];
     } else {
       // Make the button do something.
       [button setTarget:barController_];
       [button setAction:@selector(openBookmark:)];
       [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];
   }
   return button;
 }
 
 - (id)folderTarget {
   return folderTarget_.get();
 }
@@ skipping 1627 matching lines @@
 
 - (void)setIgnoreAnimations:(BOOL)ignore {
   ignoreAnimations_ = ignore;
 }
 
 - (BookmarkButton*)buttonThatMouseIsIn {
   return buttonThatMouseIsIn_;
 }
 
 @end  // BookmarkBarFolderController