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

chrome/browser/extensions/extension_popup_api.h

Index: chrome/browser/extensions/extension_popup_api.h
diff --git a/chrome/browser/extensions/extension_popup_api.h b/chrome/browser/extensions/extension_popup_api.h
index 32fb628b616cb2460f183b1f9773b5d44728c323..a565cafab8084dd67970034fcce0c12159d25cac 100644
--- a/chrome/browser/extensions/extension_popup_api.h
+++ b/chrome/browser/extensions/extension_popup_api.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2009 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.
 
@@ -9,10 +9,6 @@
 #include "chrome/browser/extensions/extension_function.h"
 #include "chrome/common/notification_registrar.h"
 
-namespace gfx {
-class Point;
-}  // namespace gfx
-
 class Profile;
 class ExtensionPopup;