Providing more information on why certain users can't be added to multi-profile

ash/shell/shell_delegate_impl.cc

 // Copyright (c) 2012 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 "ash/shell/shell_delegate_impl.h"
 
 #include "ash/accessibility_delegate.h"
 #include "ash/default_accessibility_delegate.h"
 #include "ash/default_user_wallpaper_delegate.h"
 #include "ash/gpu_support_stub.h"
@@ skipping 110 matching lines @@
   }
   virtual const user_manager::UserInfo* GetUserInfo(
       content::BrowserContext* context) const OVERRIDE {
     return user_info_.get();
   }
   virtual bool ShouldShowAvatar(aura::Window* window) const OVERRIDE {
     return !user_info_->GetImage().isNull();
   }
   virtual void SwitchActiveUser(const std::string& user_id) OVERRIDE {}
   virtual void CycleActiveUser(CycleUser cycle_user) OVERRIDE {}
+  virtual PrimaryUserPolicy GetPrimaryUserPolicy() const OVERRIDE {
+    return PRIMARY_USER_POLICY_ALLOW;
+  }
   virtual void AddSessionStateObserver(
       ash::SessionStateObserver* observer) OVERRIDE {}
   virtual void RemoveSessionStateObserver(
       ash::SessionStateObserver* observer) OVERRIDE {}
 
  private:
   bool screen_locked_;
 
   // A pseudo user info.
   scoped_ptr<user_manager::UserInfo> user_info_;
@@ skipping 112 matching lines @@
   // Real GPU support depends on src/content, so just use a stub.
   return new GPUSupportStub;
 }
 
 base::string16 ShellDelegateImpl::GetProductName() const {
   return base::string16();
 }
 
 }  // namespace shell
 }  // namespace ash