Mac. Build bookmark tooltips more intelligently, not showing title if same as URL.

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

 // Copyright (c) 2011 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 "base/mac/mac_util.h"
 #include "base/sys_string_conversions.h"
 #include "chrome/browser/bookmarks/bookmark_model.h"
 #include "chrome/browser/bookmarks/bookmark_utils.h"
@@ skipping 371 matching lines @@
   [button setDelegate:self];
   if (node) {
     if (node->is_folder()) {
       [button setTarget:self];
       [button setAction:@selector(openBookmarkFolderFromButton:)];
     } else {
       // Make the button do something.
       [button setTarget:self];
       [button setAction:@selector(openBookmark:)];
       // Add a tooltip.
-      NSString* title = base::SysUTF16ToNSString(node->GetTitle());
-      std::string urlString = node->GetURL().possibly_invalid_spec();
-      NSString* tooltip = [NSString stringWithFormat:@"%@\n%s", title,
-                                    urlString.c_str()];
-      [button setToolTip:tooltip];
+      [button setToolTip:[barController_ tooltipForNode:node]];
       [button setAcceptsTrackIn:YES];
     }
   } else {
     [button setEnabled:NO];
     [button setBordered:NO];
   }
   return button;
 }
 
 - (id)folderTarget {
@@ skipping 1583 matching lines @@
 
 - (void)setIgnoreAnimations:(BOOL)ignore {
   ignoreAnimations_ = ignore;
 }
 
 - (BookmarkButton*)buttonThatMouseIsIn {
   return buttonThatMouseIsIn_;
 }
 
 @end  // BookmarkBarFolderController