Gtk3 UI: Rename files in libgtkui containing gtk2 in their name

chrome/browser/ui/libgtkui/app_indicator_icon.h

 // 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_LIBGTKUI_APP_INDICATOR_ICON_H_
 #define CHROME_BROWSER_UI_LIBGTKUI_APP_INDICATOR_ICON_H_
 
 #include <memory>
 
 #include "base/files/file_path.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/nix/xdg_util.h"
-#include "chrome/browser/ui/libgtkui/gtk2_signal.h"
+#include "chrome/browser/ui/libgtkui/gtk_signal.h"
 #include "ui/views/linux_ui/status_icon_linux.h"
 
 typedef struct _AppIndicator AppIndicator;
 typedef struct _GtkWidget GtkWidget;
 
 class SkBitmap;
 
 namespace gfx {
 class ImageSkia;
 }
@@ skipping 76 matching lines @@
   int icon_change_count_;
 
   base::WeakPtrFactory<AppIndicatorIcon> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AppIndicatorIcon);
 };
 
 }  // namespace libgtkui
 
 #endif  // CHROME_BROWSER_UI_LIBGTKUI_APP_INDICATOR_ICON_H_