Get rid of trivial IncognitoUserPrefStore and PerTabUserPrefStore.

chrome/browser/prefs/incognito_user_pref_store.h

Index: chrome/browser/prefs/incognito_user_pref_store.h
diff --git a/chrome/browser/prefs/incognito_user_pref_store.h b/chrome/browser/prefs/incognito_user_pref_store.h
deleted file mode 100644
index 9b272a28bc98dee75646d5a0741b181445b52589..0000000000000000000000000000000000000000
--- a/chrome/browser/prefs/incognito_user_pref_store.h
+++ /dev/null
@@ -1,20 +0,0 @@
-// Copyright (c) 2011 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_BROWSER_PREFS_INCOGNITO_USER_PREF_STORE_H_
-#define CHROME_BROWSER_PREFS_INCOGNITO_USER_PREF_STORE_H_
-#pragma once
-
-#include "base/basictypes.h"
-#include "chrome/browser/prefs/overlay_user_pref_store.h"
-
-class IncognitoUserPrefStore : public OverlayUserPrefStore {
- public:
-  explicit IncognitoUserPrefStore(PersistentPrefStore* underlay);
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(IncognitoUserPrefStore);
-};
-
-#endif  // CHROME_BROWSER_PREFS_INCOGNITO_USER_PREF_STORE_H_