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

chrome/browser/browser_theme_pack.h

Index: chrome/browser/browser_theme_pack.h
diff --git a/chrome/browser/browser_theme_pack.h b/chrome/browser/browser_theme_pack.h
index 3227136dc0894732486153246451028f5238d4de..c5b20ebcb6c3e73e9b54d8e8158b5ef0ef4cba35 100644
--- a/chrome/browser/browser_theme_pack.h
+++ b/chrome/browser/browser_theme_pack.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.
 
@@ -15,7 +15,6 @@
 #include "gfx/color_utils.h"
 #include "chrome/common/extensions/extension.h"
 
-class BrowserThemeProviderTest;
 namespace base {
 class DataPack;
 }