Adds favicon and thumbnail columns to the chrome://suggestions-internals/ page.

chrome/browser/resources/suggestions_internals/suggestions_internals.js

 // 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.
 
 /**
  * Javascript for suggestions_internals.html, served from
  * chrome://suggestions-internals/. This is used to debug suggestions ranking.
  * When loaded, the page will show the current set of suggestions, along with a
  * large set of information (e.g. all the signals that were taken into
  * consideration for deciding which pages were selected to be shown to the user)
@@ skipping 70 matching lines @@
       return IGNORED_COLUMNS.indexOf(column) < 0;
     });
 
     // Move the preferred columns to the start of the column list.
     for (var i = PREFERRED_COLUMN_ORDER.length - 1; i >= 0; i--) {
       var index = columns.indexOf(PREFERRED_COLUMN_ORDER[i]);
       if (index >= 0)
         columns.unshift(columns.splice(index, 1)[0]);
     }
 
-    // Prepend a "Rank" column.
+    // Special columns.
+    columns.unshift('favicon');
+    columns.unshift('screenshot');
     columns.unshift('rank');
 
     // Erase whatever is currently being displayed.
     var output = $('suggestions-debug-text');
     output.innerHTML = '';
 
     // Create the container table and add the header row.
     var table = document.createElement('table');
     table.className = 'suggestions-debug-table';
     var header = document.createElement('tr');
@@ skipping 18 matching lines @@
           if (/^https?:\/\/.+$/.test(data)) {
             var anchor = document.createElement('a');
             anchor.href = data;
             anchor.innerText = data;
             column.appendChild(anchor);
           } else {
             column.innerText = data;
           }
         } else if (column_name == 'rank') {
           column.innerText = rank++;
+        } else if (column_name == 'screenshot') {
+          var thumbnailUrl = 'chrome://thumb/' + entry.url;
+          var img = document.createElement('img');
+          img.onload = function() { column.innerText = 'Y'; }
+          img.onerror = function() { column.innerText = 'N'; }
+          img.src = thumbnailUrl;
+        } else if (column_name == 'favicon') {
+          var faviconUrl = 'chrome://favicon/size/16/' + entry.url;
+          column.style.backgroundImage = url(faviconUrl);
+          column.style.backgroundRepeat = 'no-repeat';
+          column.style.backgroundPosition = 'center center';
         }
         row.appendChild(column);
       });
       table.appendChild(row);
     });
 
     output.appendChild(table);
   }
 
   return {
     initialize: initialize,
     setSuggestions: setSuggestions
   };
 });
 
 document.addEventListener('DOMContentLoaded', suggestionsInternals.initialize);