Change userid from a uint32_t to a string guid

components/mus/mus_app.cc

 // Copyright 2014 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/mus/mus_app.h"
 
 #include <set>
 
 #include "base/memory/weak_ptr.h"
 #include "base/stl_util.h"
@@ skipping 77 matching lines @@
       resource_loader.ReleaseFile(kResourceFileStrings),
       base::MemoryMappedFile::Region::kWholeFile);
   ui::ResourceBundle::GetSharedInstance().AddDataPackFromFile(
       resource_loader.ReleaseFile(kResourceFile100), ui::SCALE_FACTOR_100P);
   ui::ResourceBundle::GetSharedInstance().AddDataPackFromFile(
       resource_loader.ReleaseFile(kResourceFile200), ui::SCALE_FACTOR_200P);
 }
 
 void MandolineUIServicesApp::Initialize(mojo::Connector* connector,
                                         const std::string& url,
-                                        uint32_t id,
-                                        uint32_t user_id) {
+                                        const std::string& user_id,
+                                        uint32_t id) {
   connector_ = connector;
   surfaces_state_ = new SurfacesState;
 
   base::PlatformThread::SetName("mus");
 
 #if defined(USE_X11)
   XInitThreads();
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   if (command_line->HasSwitch(kUseX11TestConfig)) {
     ui::test::SetUseOverrideRedirectWindowByDefault(true);
@@ skipping 126 matching lines @@
   ws::Display* host_impl = new ws::Display(
       connection_manager_.get(), connector_, gpu_state_, surfaces_state_);
 
   scoped_ptr<ws::DisplayBindingImpl> display_binding(new ws::DisplayBindingImpl(
       std::move(host), host_impl, std::move(tree_client),
       connection_manager_.get()));
   host_impl->Init(std::move(display_binding));
 }
 
 }  // namespace mus