Handful of related instant changes:

chrome/browser/instant/instant_opt_in.h

Index: chrome/browser/instant/instant_opt_in.h
diff --git a/chrome/browser/instant/instant_opt_in.h b/chrome/browser/instant/instant_opt_in.h
deleted file mode 100644
index 55c62fbe025238a79e5cc24abce72cb1a3f33bb5..0000000000000000000000000000000000000000
--- a/chrome/browser/instant/instant_opt_in.h
+++ /dev/null
@@ -1,25 +0,0 @@
-// 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.
-
-#ifndef CHROME_BROWSER_INSTANT_INSTANT_OPT_IN_H_
-#define CHROME_BROWSER_INSTANT_INSTANT_OPT_IN_H_
-#pragma once
-
-#include "gfx/native_widget_types.h"
-
-class Profile;
-
-namespace browser {
-
-// Returns true if the opt-in should be shown.
-bool ShouldShowInstantOptIn(Profile* profile);
-
-// Invoked if the user clicks on the opt-in promo.
-void UserPickedInstantOptIn(gfx::NativeWindow parent,
-                            Profile* profile,
-                            bool opt_in);
-
-}  // namespace browser
-
-#endif  // CHROME_BROWSER_INSTANT_INSTANT_OPT_IN_H_