Supporting high dpi favicons in Instant Extended.

chrome/renderer/resources/extensions/searchbox_api.js

Index: chrome/renderer/resources/extensions/searchbox_api.js
diff --git a/chrome/renderer/resources/extensions/searchbox_api.js b/chrome/renderer/resources/extensions/searchbox_api.js
index 8a21d03203c9ac63829d20aad4507a5a1bfa1e2d..5fee814b82cc255586229467bdd96d225e7cf3c1 100644
--- a/chrome/renderer/resources/extensions/searchbox_api.js
+++ b/chrome/renderer/resources/extensions/searchbox_api.js
@@ -258,16 +258,24 @@ if (!chrome.embeddedSearch) {
       function GetMostVisitedItemsWrapper() {
         var mostVisitedItems = GetMostVisitedItems();
         for (var i = 0, item; item = mostVisitedItems[i]; ++i) {
+          item.faviconUrl = GenerateThumbnailURL(item.renderViewId, item.rid);
           // These properties are private data and should not be returned to
           // the page. They are only accessible via getMostVisitedItemData().
           item.url = null;
           item.title = null;
           item.domain = null;
           item.direction = null;
+          item.renderViewId = null;
         }
         return mostVisitedItems;
       }
 
+      function GenerateThumbnailURL(renderViewId, rid) {
+        return "chrome-search://favicon/size/16@" +
+            window.devicePixelRatio + "x/" +
+            renderViewId + "/" + rid;
+      }
+
       // =======================================================================
       //                           Exported functions
       // =======================================================================