Remove obviously unneeded forward declarations in chrome/browser/[abef]*/*.h.

chrome/browser/bookmarks/bookmark_model.h

Index: chrome/browser/bookmarks/bookmark_model.h
diff --git a/chrome/browser/bookmarks/bookmark_model.h b/chrome/browser/bookmarks/bookmark_model.h
index 84856def6724c655e9bece6d737faa006cdeaa1f..60483155f07e01261478555037112a6e14bd6a4a 100644
--- a/chrome/browser/bookmarks/bookmark_model.h
+++ b/chrome/browser/bookmarks/bookmark_model.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
+// Copyright (c) 2010 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.
 
@@ -27,8 +27,6 @@
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "testing/gtest/include/gtest/gtest_prod.h"
 
-class BookmarkCodec;
-class BookmarkEditorView;
 class BookmarkIndex;
 class BookmarkLoadDetails;
 class BookmarkModel;