Gtk3 ui: Add libgtk3ui as a separate build component

chrome/browser/ui/libgtkui/app_indicator_icon.cc

 // 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.
 
-#include "chrome/browser/ui/libgtk2ui/app_indicator_icon.h"
+#include "chrome/browser/ui/libgtkui/app_indicator_icon.h"
 
 #include <dlfcn.h>
 #include <gtk/gtk.h>
 
 #include "base/bind.h"
 #include "base/environment.h"
 #include "base/files/file_util.h"
 #include "base/md5.h"
 #include "base/memory/ref_counted_memory.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/sequenced_worker_pool.h"
-#include "chrome/browser/ui/libgtk2ui/app_indicator_icon_menu.h"
+#include "chrome/browser/ui/libgtkui/app_indicator_icon_menu.h"
 #include "content/public/browser/browser_thread.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkCanvas.h"
 #include "ui/base/models/menu_model.h"
 #include "ui/gfx/codec/png_codec.h"
 #include "ui/gfx/image/image.h"
 #include "ui/gfx/image/image_skia.h"
 
 namespace {
 
@@ skipping 135 matching lines @@
 }
 
 void DeleteTempDirectory(const base::FilePath& dir_path) {
   if (dir_path.empty())
     return;
   base::DeleteFile(dir_path, true);
 }
 
 }  // namespace
 
-namespace libgtk2ui {
+namespace libgtkui {
 
 AppIndicatorIcon::AppIndicatorIcon(std::string id,
                                    const gfx::ImageSkia& image,
                                    const base::string16& tool_tip)
     : id_(id),
       icon_(NULL),
       menu_model_(NULL),
       icon_change_count_(0),
       weak_factory_(this) {
   std::unique_ptr<base::Environment> env(base::Environment::Create());
@@ skipping 202 matching lines @@
       tool_tip_.c_str(),
       base::Bind(&AppIndicatorIcon::OnClickActionReplacementMenuItemActivated,
                  base::Unretained(this)));
 }
 
 void AppIndicatorIcon::OnClickActionReplacementMenuItemActivated() {
   if (delegate())
     delegate()->OnClick();
 }
 
-}  // namespace libgtk2ui
+}  // namespace libgtkui