Extract Notifications kClickWasNotAnAction constant

content/public/common/platform_notification_data.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_COMMON_PLATFORM_NOTIFICATION_DATA_H_
 #define CONTENT_PUBLIC_COMMON_PLATFORM_NOTIFICATION_DATA_H_
 
 #include <string>
 #include <vector>
 
 #include "base/strings/string16.h"
 #include "content/common/content_export.h"
 #include "url/gurl.h"
 
 namespace content {
 
+// Maximum number of actions on a Platform Notification.

[Peter Beverloo, 2015/10/22 11:33:39]

nit: s/Platform Notification/platform notification/.

+static const size_t kPlatformNotificationMaxActions = 2;
+
+// When a notification is clicked, passing this value for |actionIndex|

[Peter Beverloo, 2015/10/22 11:33:39]

Referring to specific arguments has little meaning here. It would be best to
keep this generic.

// Value to use when the body of a notification was clicked rather than an
// action button. Must be ...

+// indicates that the main body of the notification was clicked, rather than an
+// action button. Must be kept in sync with
+// NotificationUIManager.CLICK_WAS_NOT_AN_ACTION.
+static const int kNotificationClickWasNotAnAction = -1;

[Peter Beverloo, 2015/10/22 11:33:39]

kInvalidNotificationAction?
kNoNotificationAction?

+
 // A notification action (button); corresponds to Blink WebNotificationAction.
 struct CONTENT_EXPORT PlatformNotificationAction {
   PlatformNotificationAction();
   ~PlatformNotificationAction();
 
   // Action name that the author can use to distinguish them.
   std::string action;
 
   // Title of the button.
   base::string16 title;
@@ skipping 53 matching lines @@
   // a serialized string. Must not exceed |kMaximumDeveloperDataSize| bytes.
   std::vector<char> data;
 
   // Actions that should be shown as buttons on the notification.
   std::vector<PlatformNotificationAction> actions;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_PLATFORM_NOTIFICATION_DATA_H_