Revert r252832: Eliminate Bookmarks dependence to bookmark_undo_utils.h.

chrome/browser/bookmarks/bookmark_model.cc

Index: chrome/browser/bookmarks/bookmark_model.cc
diff --git a/chrome/browser/bookmarks/bookmark_model.cc b/chrome/browser/bookmarks/bookmark_model.cc
index ea4ddbfb80a111f40ab8c8e925696d1756db8277..6611a04c306f788e63c0c85ddc8adb0f441fa90e 100644
--- a/chrome/browser/bookmarks/bookmark_model.cc
+++ b/chrome/browser/bookmarks/bookmark_model.cc
@@ -284,16 +284,6 @@ void BookmarkModel::EndExtensiveChanges() {
   }
 }
 
-void BookmarkModel::BeginGroupedChanges() {
-  FOR_EACH_OBSERVER(BookmarkModelObserver, observers_,
-                    GroupedBookmarkChangesBeginning(this));
-}
-
-void BookmarkModel::EndGroupedChanges() {
-  FOR_EACH_OBSERVER(BookmarkModelObserver, observers_,
-                    GroupedBookmarkChangesEnded(this));
-}
-
 void BookmarkModel::Remove(const BookmarkNode* parent, int index) {
   if (!loaded_ || !IsValidIndex(parent, index, false) || is_root_node(parent)) {
     NOTREACHED();