Add a dialog for getting user consent in the echo redeem flow.

chrome/browser/ui/echo_dialog_chromeos.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 CHROME_BROWSER_UI_ECHO_DIALOG_CHROMEOS_H_
+#define CHROME_BROWSER_UI_ECHO_DIALOG_CHROMEOS_H_
+
+#include "base/string16.h"
+#include "ui/gfx/native_widget_types.h"
+
+// Dialog shown by echoPrivate extension API when getUserConsent function is
+// called. The API is used by echo extension when an offer from a service is
+// being redeemed. The dialog is shown to get an user consent. If the echo
+// extension is not allowed by policy to redeem offers, the dialog informs user
+// about this.
+// This is ChromeOS-only dialog.
+class EchoDialog {
+ public:
+
+  // A listener interface for the EchoDialog, so an interested party can be
+  // notified about changes to the dialog. It is provided during EchoDialog
+  // construction.
+  class Listener {

[tfarina, 2013/02/26 19:13:00]

no nested class. Please, put this in echo_dialog_lister.h and name it
EchoDialogListener.

[tbarzic, 2013/02/26 19:34:55]

Done.

+   public:
+    virtual ~Listener() {}

[tfarina, 2013/02/26 19:13:00]

make this protected

[tbarzic, 2013/02/26 19:34:55]

Done.

+
+    // Called when the EchoDialog is accepted. After call to this method, the
+    // listener will not be invoked again.
+    virtual void OnAccept() = 0;

[tfarina, 2013/02/26 19:13:00]

put one blank line after each method.

[tbarzic, 2013/02/26 19:34:55]

Done.

+    // Called when the EchoDialog is canceled. After call to this method, the
+    // listener will not be invoked again.
+    virtual void OnCancel() = 0;
+    // Called when a link in the EchoDialog is clicked.
+    virtual void OnMoreInfoLinkClicked() = 0;
+  };
+
+  virtual ~EchoDialog() {}
+
+  // Creates platform specific (only ChromeOS) implementation of EchoDialog.
+  // Implementation in chrome/browser/ui/views/echo_dialog_views_chromeos.cc
+  static EchoDialog* Create(Listener* listener);
+
+  // Initializes dialog layout that will be showed when echo extension is
+  // allowed to redeem offers. |service_name| is the name of the service that
+  // requests user consent to redeem an offer. |origin| is the service's origin
+  // url. Service name should be underlined in the dialog, and hovering over its
+  // label should display tooltip containing |origin|.
+  // The dialog will have both OK and Cancel buttons.
+  virtual void InitForEnabledEcho(const string16& service_name,
+                                  const string16& origin) = 0;
+
+  // Initializes dialog layout that will be shown when echo extension is not
+  // allowed to redeem offers. The dialog will be showing a message that the
+  // offer redeeming is disabled by policy.
+  // The dialog will have only Cancel button.
+  virtual void InitForDisabledEcho() = 0;
+
+  // Shows the dialog.
+  virtual void Show(gfx::NativeWindow parent) = 0;
+};
+
+#endif  // CHROME_BROWSER_UI_ECHO_DIALOG_CHROMEOS_H_