Implement Android UI of web notification inline replies

ui/message_center/notification.h

 // Copyright (c) 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_MESSAGE_CENTER_NOTIFICATION_H_
 #define UI_MESSAGE_CENTER_NOTIFICATION_H_
 
 #include <stddef.h>
 
 #include <string>
 #include <vector>
 
+#include "base/strings/nullable_string16.h"
 #include "base/strings/string16.h"
 #include "base/time/time.h"
 #include "base/values.h"
 #include "ui/gfx/image/image.h"
 #include "ui/message_center/message_center_export.h"
 #include "ui/message_center/notification_delegate.h"
 #include "ui/message_center/notification_types.h"
 #include "ui/message_center/notifier_settings.h"
 #include "url/gurl.h"
 
 namespace message_center {
 
+// A Java counterpart will be generated for this enum.
+// GENERATED_JAVA_ENUM_PACKAGE: org.chromium.chrome.browser.notifications
+enum ButtonInfoType {
+  // Standard clickable button.
+  BUTTON_INFO_TYPE_BUTTON = 0,
+
+  // Action that supports an inline text reply.
+  BUTTON_INFO_TYPE_TEXT
+};
+
 struct MESSAGE_CENTER_EXPORT NotificationItem {
   base::string16 title;
   base::string16 message;
 
   NotificationItem(const base::string16& title, const base::string16& message);
 };
 
+// TODO(nsatragno): rename to ActionInfo.
 struct MESSAGE_CENTER_EXPORT ButtonInfo {
+  // Defaults to BUTTON_INFO_TYPE_BUTTON.
+  ButtonInfoType type;
   base::string16 title;
   gfx::Image icon;
+  base::NullableString16 placeholder;
 
   ButtonInfo(const base::string16& title);
 };
 
 class MESSAGE_CENTER_EXPORT RichNotificationData {
  public:
   RichNotificationData();
   RichNotificationData(const RichNotificationData& other);
   ~RichNotificationData();
 
@@ skipping 243 matching lines @@
   bool is_read_;  // True if this has been seen in the message center.
 
   // A proxy object that allows access back to the JavaScript object that
   // represents the notification, for firing events.
   scoped_refptr<NotificationDelegate> delegate_;
 };
 
 }  // namespace message_center
 
 #endif  // UI_MESSAGE_CENTER_NOTIFICATION_H_