Set GTK_PATH to CHROMIUM_SAVED_GTK_PATH before launching xdg-open....

chrome/common/platform_util_linux.cc

 // Copyright (c) 2009 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/common/platform_util.h"
 
 #include <gtk/gtk.h>
 
 #include "base/file_util.h"
 #include "base/process_util.h"
 #include "base/string_util.h"
 #include "chrome/common/process_watcher.h"
 
 namespace {
 
 void XDGOpen(const FilePath& path) {
   std::vector<std::string> argv;
   argv.push_back("xdg-open");
   argv.push_back(path.value());
   base::file_handle_mapping_vector no_files;
+  base::environment_vector env;
+  env.push_back(std::make_pair("GTK_PATH", getenv("CHROMIUM_SAVED_GTK_PATH")));
   base::ProcessHandle handle;
-  if (base::LaunchApp(argv, no_files, false, &handle))
+  if (base::LaunchApp(argv, env, no_files, false, &handle))
     ProcessWatcher::EnsureProcessGetsReaped(handle);
 }
 
 }  // namespace
 
 namespace platform_util {
 
 // TODO(estade): It would be nice to be able to select the file in the file
 // manager, but that probably requires extending xdg-open. For now just
 // show the folder.
@@ skipping 23 matching lines @@
 
 bool IsWindowActive(gfx::NativeWindow window) {
   return gtk_window_is_active(window);
 }
 
 bool IsVisible(gfx::NativeView view) {
   return GTK_WIDGET_VISIBLE(view);
 }
 
 }  // namespace platform_util