Revert "Refactor automation messages." due to mysterious problems on mac.

chrome/common/page_type.h

Index: chrome/common/page_type.h
diff --git a/chrome/common/page_type.h b/chrome/common/page_type.h
deleted file mode 100644
index 2a2bd1aa825fbc07bfde646e2df6cac2c7745ad0..0000000000000000000000000000000000000000
--- a/chrome/common/page_type.h
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright (c) 2009 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.
-
-#ifndef CHROME_COMMON_PAGE_TYPE_H_
-#define CHROME_COMMON_PAGE_TYPE_H_
-#pragma once
-
-// The type of the page an entry corresponds to.  Used by chrome_frame and the
-// automation layer to detect the state of a TabContents.
-enum PageType {
-  NORMAL_PAGE = 0,
-  ERROR_PAGE,
-  INTERSTITIAL_PAGE
-};
-
-#endif  // CHROME_COMMON_PAGE_TYPE_H_