Change userid from a uint32_t to a string guid

components/filesystem/file_system_app.cc

 // Copyright 2015 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 "components/filesystem/file_system_app.h"
 
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "mojo/shell/public/cpp/connection.h"
@@ skipping 21 matching lines @@
 const char kUserDataDir[] = "user-data-dir";
 
 }  // namespace filesystem
 
 FileSystemApp::FileSystemApp() : lock_table_(new LockTable) {}
 
 FileSystemApp::~FileSystemApp() {}
 
 void FileSystemApp::Initialize(mojo::Connector* connector,
                                const std::string& url,
-                               uint32_t id, uint32_t user_id) {
+                               const std::string& user_id,
+                               uint32_t id) {
   tracing_.Initialize(connector, url);
 }
 
 bool FileSystemApp::AcceptConnection(mojo::Connection* connection) {
   connection->AddInterface<FileSystem>(this);
   return true;
 }
 
 // |InterfaceFactory<Files>| implementation:
 void FileSystemApp::Create(mojo::Connection* connection,
@@ skipping 31 matching lines @@
 #endif
   }
 
   if (!base::PathExists(path))
     base::CreateDirectory(path);
 
   return path;
 }
 
 }  // namespace filesystem