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

chrome/browser/ui/libgtkui/gtk_status_icon.h

Index: chrome/browser/ui/libgtkui/gtk_status_icon.h
diff --git a/chrome/browser/ui/libgtkui/gtk2_status_icon.h b/chrome/browser/ui/libgtkui/gtk_status_icon.h
similarity index 87%
rename from chrome/browser/ui/libgtkui/gtk2_status_icon.h
rename to chrome/browser/ui/libgtkui/gtk_status_icon.h
index f5be3a8d1164684a47370477eaf86c439f88fa4f..e4e0da40981ca58964dfdcbd3fc0f730c9c09ec1 100644
--- a/chrome/browser/ui/libgtkui/gtk2_status_icon.h
+++ b/chrome/browser/ui/libgtkui/gtk_status_icon.h
@@ -2,14 +2,14 @@
 // 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_GTK2_STATUS_ICON_H_
-#define CHROME_BROWSER_UI_LIBGTKUI_GTK2_STATUS_ICON_H_
+#ifndef CHROME_BROWSER_UI_LIBGTKUI_GTK_STATUS_ICON_H_
+#define CHROME_BROWSER_UI_LIBGTKUI_GTK_STATUS_ICON_H_
 
 #include <memory>
 
 #include "base/macros.h"
 #include "base/strings/string16.h"
-#include "chrome/browser/ui/libgtkui/gtk2_signal.h"
+#include "chrome/browser/ui/libgtkui/gtk_signal.h"
 #include "ui/base/glib/glib_integers.h"
 #include "ui/base/glib/glib_signal.h"
 #include "ui/views/linux_ui/status_icon_linux.h"
@@ -59,4 +59,4 @@ class Gtk2StatusIcon : public views::StatusIconLinux {
 
 }  // namespace libgtkui
 
-#endif  // CHROME_BROWSER_UI_LIBGTKUI_GTK2_STATUS_ICON_H_
+#endif  // CHROME_BROWSER_UI_LIBGTKUI_GTK_STATUS_ICON_H_