Gtk3 ui: Add libgtk3ui as a separate build component

chrome/browser/ui/libgtkui/unity_service.cc

Index: chrome/browser/ui/libgtkui/unity_service.cc
diff --git a/chrome/browser/ui/libgtk2ui/unity_service.cc b/chrome/browser/ui/libgtkui/unity_service.cc
similarity index 95%
rename from chrome/browser/ui/libgtk2ui/unity_service.cc
rename to chrome/browser/ui/libgtkui/unity_service.cc
index 7bdf8010dba76a1d8738f203046b132bfea3efd6..eb382e22eb1f226a2b4ecd80cb4513baec289b8c 100644
--- a/chrome/browser/ui/libgtk2ui/unity_service.cc
+++ b/chrome/browser/ui/libgtkui/unity_service.cc
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chrome/browser/ui/libgtk2ui/unity_service.h"
+#include "chrome/browser/ui/libgtkui/unity_service.h"
 
 #include <dlfcn.h>
 #include <gtk/gtk.h>
@@ -12,8 +12,7 @@
 
 #include "base/environment.h"
 #include "base/nix/xdg_util.h"
-#include "chrome/browser/shell_integration_linux.h"
-#include "chrome/browser/ui/libgtk2ui/gtk2_util.h"
+#include "chrome/browser/ui/libgtkui/gtk2_util.h"
 
 // Unity data typedefs.
 typedef struct _UnityInspector UnityInspector;
@@ -93,7 +92,7 @@ void EnsureMethodsLoaded() {
       reinterpret_cast<unity_launcher_entry_get_for_desktop_id_func>(
           dlsym(unity_lib, "unity_launcher_entry_get_for_desktop_id"));
   if (entry_get_for_desktop_id) {
-    std::string desktop_id = libgtk2ui::GetDesktopName(env.get());
+    std::string desktop_id = libgtkui::GetDesktopName(env.get());
     chrome_entry = entry_get_for_desktop_id(desktop_id.c_str());
 
     entry_set_count =