Linux Aura: Use incognito profile to theme incognito browser windows

chrome/browser/ui/views/theme_profile_key.h

Index: chrome/browser/ui/views/theme_profile_key.h
diff --git a/chrome/browser/ui/views/theme_profile_key.h b/chrome/browser/ui/views/theme_profile_key.h
deleted file mode 100644
index ce164808d791932e37d0bc4c2659269b88f4774f..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/views/theme_profile_key.h
+++ /dev/null
@@ -1,17 +0,0 @@
-// Copyright 2017 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_UI_VIEWS_THEME_PROFILE_KEY_H_
-#define CHROME_BROWSER_UI_VIEWS_THEME_PROFILE_KEY_H_
-
-namespace aura {
-class Window;
-}
-
-class Profile;
-
-void SetThemeProfileForWindow(aura::Window* window, Profile* profile);
-Profile* GetThemeProfileForWindow(aura::Window*);
-
-#endif  // CHROME_BROWSER_UI_VIEWS_THEME_PROFILE_KEY_H_