Delete obviously unneeded forward declarations in chrome/browser/*.h.

chrome/browser/encoding_menu_controller.h

Index: chrome/browser/encoding_menu_controller.h
diff --git a/chrome/browser/encoding_menu_controller.h b/chrome/browser/encoding_menu_controller.h
index 42f4eee5ca1a4af26304236319a99c6d40031d37..fc907f8a5980e976183fcc82646bc9b9e7d038c4 100644
--- a/chrome/browser/encoding_menu_controller.h
+++ b/chrome/browser/encoding_menu_controller.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.
 
@@ -14,7 +14,6 @@
 #include "base/gtest_prod_util.h"
 #include "base/string16.h"
 
-class Browser;
 class Profile;
 
 // Cross-platform logic needed for the encoding menu.