BookmarkClient can add extra nodes to BookmarkModel.

chrome/browser/bookmarks/bookmark_model_factory.h

Index: chrome/browser/bookmarks/bookmark_model_factory.h
diff --git a/chrome/browser/bookmarks/bookmark_model_factory.h b/chrome/browser/bookmarks/bookmark_model_factory.h
index 87180ced7fd16fab8691ee14ed3d1d8413cabc19..5b4fd183c972594c2320ded12a548f8dd8b16e72 100644
--- a/chrome/browser/bookmarks/bookmark_model_factory.h
+++ b/chrome/browser/bookmarks/bookmark_model_factory.h
@@ -11,8 +11,9 @@
 
 template <typename T> struct DefaultSingletonTraits;
 
-class Profile;
 class BookmarkModel;
+class ChromeBookmarkClient;
+class Profile;
 
 // Singleton that owns all BookmarkModel and associates them with Profiles.
 class BookmarkModelFactory : public BrowserContextKeyedServiceFactory {
@@ -21,6 +22,9 @@ class BookmarkModelFactory : public BrowserContextKeyedServiceFactory {
 
   static BookmarkModel* GetForProfileIfExists(Profile* profile);
 
+  static ChromeBookmarkClient* GetChromeBookmarkClientForProfile(
+      Profile* profile);
+
   static BookmarkModelFactory* GetInstance();
 
  private: