Moving It2Me confirmation prompt into the Validation callback flow

remoting/host/it2me/it2me_confirmation_dialog_proxy.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 "remoting/host/it2me/it2me_confirmation_dialog_proxy.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
 #include "base/location.h"
 #include "base/macros.h"
 #include "base/threading/thread_task_runner_handle.h"
 
 namespace remoting {
 
 class It2MeConfirmationDialogProxy::Core {
  public:
   Core(scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
        scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
        base::WeakPtr<It2MeConfirmationDialogProxy> parent,
        std::unique_ptr<It2MeConfirmationDialog> dialog);
   ~Core();
 
   // Shows the wrapped dialog. Must be called on the UI thread.
-  void Show();
+  void Show(const std::string& remote_user_email);
 
   scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner() {
     return ui_task_runner_;
   }
 
   scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner() {
     return caller_task_runner_;
   }
 
  private:
@@ skipping 15 matching lines @@
     std::unique_ptr<It2MeConfirmationDialog> dialog)
     : ui_task_runner_(ui_task_runner),
       caller_task_runner_(caller_task_runner),
       parent_(parent),
       dialog_(std::move(dialog)) {}
 
 It2MeConfirmationDialogProxy::Core::~Core() {
   DCHECK(ui_task_runner_->BelongsToCurrentThread());
 }
 
-void It2MeConfirmationDialogProxy::Core::Show() {
+void It2MeConfirmationDialogProxy::Core::Show(
+    const std::string& remote_user_email) {
   DCHECK(ui_task_runner_->BelongsToCurrentThread());
 
-  dialog_->Show(base::Bind(&It2MeConfirmationDialogProxy::Core::ReportResult,
+  dialog_->Show(remote_user_email,
+                base::Bind(&It2MeConfirmationDialogProxy::Core::ReportResult,
                            base::Unretained(this)));
 }
 
 void It2MeConfirmationDialogProxy::Core::ReportResult(
     It2MeConfirmationDialog::Result result) {
   DCHECK(ui_task_runner_->BelongsToCurrentThread());
   caller_task_runner_->PostTask(
       FROM_HERE,
       base::Bind(&It2MeConfirmationDialogProxy::ReportResult, parent_, result));
 }
 
 It2MeConfirmationDialogProxy::It2MeConfirmationDialogProxy(
     scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
     std::unique_ptr<It2MeConfirmationDialog> dialog)
     : weak_factory_(this) {
   core_.reset(new Core(ui_task_runner, base::ThreadTaskRunnerHandle::Get(),
                        weak_factory_.GetWeakPtr(), std::move(dialog)));
 }
 
 It2MeConfirmationDialogProxy::~It2MeConfirmationDialogProxy() {
   DCHECK(core_->caller_task_runner()->BelongsToCurrentThread());
 
   auto ui_task_runner = core_->ui_task_runner();
   ui_task_runner->DeleteSoon(FROM_HERE, core_.release());
 }
 
 void It2MeConfirmationDialogProxy::Show(
+    const std::string& remote_user_email,
     const It2MeConfirmationDialog::ResultCallback& callback) {
   DCHECK(core_->caller_task_runner()->BelongsToCurrentThread());
 
   callback_ = callback;
-  core_->ui_task_runner()->PostTask(FROM_HERE,
-                                    base::Bind(&Core::Show,
-                                               base::Unretained(core_.get())));
+  core_->ui_task_runner()->PostTask(
+      FROM_HERE, base::Bind(&Core::Show, base::Unretained(core_.get()),
+                            remote_user_email));
 }
 
 void It2MeConfirmationDialogProxy::ReportResult(
     It2MeConfirmationDialog::Result result) {
   DCHECK(core_->caller_task_runner()->BelongsToCurrentThread());
   base::ResetAndReturn(&callback_).Run(result);
 }
 
 }  // namespace remoting