[win] Add signin support for the app launcher.

ui/app_list/views/signin_view.h

+// Copyright 2013 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.
+
+#ifndef UI_APP_LIST_VIEWS_SIGNIN_VIEW_H_
+#define UI_APP_LIST_VIEWS_SIGNIN_VIEW_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/scoped_ptr.h"
+#include "ui/views/view.h"
+
+namespace content {
+class WebContents;
+}
+
+namespace views {
+class WebView;
+}
+
+namespace app_list {
+
+class SigninDelegate;
+
+// The SigninView is shown in the app list when the user needs to sign in.
+// It just shows a webview, which is prepared for signin by the signin delegate.
+class SigninView : public views::View {
+ public:
+  SigninView(SigninDelegate* delegate);
+  virtual ~SigninView();
+
+  // Show the signin UI and begins the signin process.
+  void BeginSignin();
+
+ private:
+  scoped_ptr<content::WebContents> web_contents_;
+  views::WebView* web_view_;
+
+  SigninDelegate* delegate_;
+
+  DISALLOW_COPY_AND_ASSIGN(SigninView);
+};
+
+}  // namespace app_list
+
+#endif  // UI_APP_LIST_VIEWS_SIGNIN_VIEW_H_