When we drag a most visited thumbnail link to the Bookmark Bar, it needs the ...

chrome/browser/resources/new_new_tab.js

 
 // Helpers
 
 function $(id) {
   return document.getElementById(id);
 }
 
 // TODO(arv): Remove these when classList is available in HTML5.
 // https://bugs.webkit.org/show_bug.cgi?id=20709
 function hasClass(el, name) {
@@ skipping 216 matching lines @@
     if (oldClassName != newClassName) {
       t.className = newClassName;
     }
 
     // No need to continue if this is a filler.
     if (newClassName == 'thumbnail-container filler') {
       continue;
     }
 
     t.href = d.url;
+    // When we drag a thumbnail to the Bookmark Bar we need a title.
+    t.title = d.title;
     t.querySelector('.pin').title = localStrings.getString(d.pinned ?
         'unpinthumbnailtooltip' : 'pinthumbnailtooltip');
     t.querySelector('.remove').title =
         localStrings.getString('removethumbnailtooltip');
 
     // There was some concern that a malformed malicious URL could cause an XSS
     // attack but setting style.backgroundImage = 'url(javascript:...)' does
     // not execute the JavaScript in WebKit.
 
     var thumbnailUrl = d.thumbnailUrl || 'chrome://thumb/' + d.url;
@@ skipping 1173 matching lines @@
     el.addEventListener('dragover', bind(this.handleDragOver, this));
     el.addEventListener('dragleave', bind(this.handleDragLeave, this));
     el.addEventListener('drop', bind(this.handleDrop, this));
     el.addEventListener('dragend', bind(this.handleDragEnd, this));
     el.addEventListener('drag', bind(this.handleDrag, this));
     el.addEventListener('mousedown', bind(this.handleMouseDown, this));
   }
 };
 
 dnd.init();