Provide sync integration tests with a way to set a favicon for a bookmark.

chrome/browser/sync/glue/bookmark_change_processor.h

Index: chrome/browser/sync/glue/bookmark_change_processor.h
diff --git a/chrome/browser/sync/glue/bookmark_change_processor.h b/chrome/browser/sync/glue/bookmark_change_processor.h
index b87fcce5877612ead585de8ee5317c28f56b8eac..65a26326f0245f825b65388d5b39e5ee256da75c 100644
--- a/chrome/browser/sync/glue/bookmark_change_processor.h
+++ b/chrome/browser/sync/glue/bookmark_change_processor.h
@@ -77,6 +77,14 @@ class BookmarkChangeProcessor : public BookmarkModelObserver,
                                  const BookmarkNode* bookmark_node,
                                  Profile* profile);
 
+  // Applies the favicon data in |icon_bytes_vector| to |bookmark_node|.
+  // |profile| is the profile that contains the HistoryService and BookmarkModel
+  // for the bookmark in question.
+  static void ApplyBookmarkFavicon(
+      const BookmarkNode* bookmark_node,
+      Profile* profile,
+      const std::vector<unsigned char>& icon_bytes_vector);
+
   // Sets the favicon of the given sync node from the given bookmark node.
   static void SetSyncNodeFavicon(const BookmarkNode* bookmark_node,
                                  BookmarkModel* model,