Gtk3 ui: Add libgtk3ui as a separate build component

chrome/browser/ui/libgtk2ui/unity_service.h

Index: chrome/browser/ui/libgtk2ui/unity_service.h
diff --git a/chrome/browser/ui/libgtk2ui/unity_service.h b/chrome/browser/ui/libgtk2ui/unity_service.h
deleted file mode 100644
index 53c900769fbeeb001a5595f02a8704bb6e7780d8..0000000000000000000000000000000000000000
--- a/chrome/browser/ui/libgtk2ui/unity_service.h
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2013 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_LIBGTK2UI_UNITY_SERVICE_H_
-#define CHROME_BROWSER_UI_LIBGTK2UI_UNITY_SERVICE_H_
-
-namespace unity {
-
-// Returns whether unity is currently running.
-bool IsRunning();
-
-// If unity is running, sets the download counter in the dock icon. Any value
-// other than 0 displays the badge.
-void SetDownloadCount(int count);
-
-// If unity is running, sets the download progress bar in the dock icon. Any
-// value between 0.0 and 1.0 (exclusive) shows the progress bar.
-void SetProgressFraction(float percentage);
-
-}  // namespace unity
-
-#endif  // CHROME_BROWSER_UI_LIBGTK2UI_UNITY_SERVICE_H_