Add a modal confirmation dialog to the enterprise profile sign-in flow.

chrome/browser/ui/webui/signin/profile_signin_confirmation_handler.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 "chrome/browser/ui/webui/signin/profile_signin_confirmation_handler.h"
+
+#include "base/bind.h"
+#include "chrome/browser/ui/webui/signin/profile_signin_confirmation_dialog.h"
+#include "content/public/browser/web_ui.h"
+#include "ui/base/ui_base_types.h"
+
+ProfileSigninConfirmationHandler::ProfileSigninConfirmationHandler(
+      ProfileSigninConfirmationDialog* dialog,
+      const base::Closure& cancel_signin,
+      const base::Closure& signin_with_new_profile,
+      const base::Closure& continue_signin)
+  : dialog_(dialog),
+    cancel_signin_(cancel_signin),
+    signin_with_new_profile_(signin_with_new_profile),
+    continue_signin_(continue_signin) {
+}
+
+ProfileSigninConfirmationHandler::~ProfileSigninConfirmationHandler() {
+}
+
+void ProfileSigninConfirmationHandler::RegisterMessages() {
+  web_ui()->RegisterMessageCallback("cancel",
+      base::Bind(&ProfileSigninConfirmationHandler::OnCancelButtonClicked,

[Andrew T Wilson (Slow), 2013/02/10 20:47:26]

See my earlier point - if you roll this into the Dialog class, then you can
invoke this callback on things like "dialog closed prematurely/via esc key".

+                 base::Unretained(this)));

[Andrew T Wilson (Slow), 2013/02/10 20:47:26]

Are we guaranteed that we'll outlive the web_ui? I think so, but just checking.

+  web_ui()->RegisterMessageCallback("createNewProfile",
+      base::Bind(&ProfileSigninConfirmationHandler::OnCreateProfileClicked,
+                 base::Unretained(this)));
+  web_ui()->RegisterMessageCallback("continue",
+      base::Bind(&ProfileSigninConfirmationHandler::OnContinueButtonClicked,
+                 base::Unretained(this)));
+}
+
+void ProfileSigninConfirmationHandler::OnCancelButtonClicked(
+    const base::ListValue* args) {
+  // TODO(dconnelly): redirect back to NTP?

[Andrew T Wilson (Slow), 2013/02/10 20:47:26]

Yeah, I'm not sure about what to do about redirects, since the user could be
signing in to gmail and in that case we don't want to redirect.

+  cancel_signin_.Run();
+  dialog_->Close();
+}
+
+void ProfileSigninConfirmationHandler::OnCreateProfileClicked(
+    const base::ListValue* args) {
+  signin_with_new_profile_.Run();
+  dialog_->Close();
+}
+
+void ProfileSigninConfirmationHandler::OnContinueButtonClicked(
+    const base::ListValue* args) {
+  continue_signin_.Run();
+  dialog_->Close();
+}