Implement receiving side of web notification inline replies

content/public/common/platform_notification_data.h

Index: content/public/common/platform_notification_data.h
diff --git a/content/public/common/platform_notification_data.h b/content/public/common/platform_notification_data.h
index b96cd802f8576639c0262e91d1bb540da7466602..39ec2b657b798ed3ea031ac473b1769297cf76ac 100644
--- a/content/public/common/platform_notification_data.h
+++ b/content/public/common/platform_notification_data.h
@@ -17,11 +17,24 @@
 
 namespace content {
 
-// A notification action (button); corresponds to Blink WebNotificationAction.
+enum CONTENT_EXPORT PlatformNotificationActionType {
+  PLATFORM_NOTIFICATION_ACTION_TYPE_BUTTON = 0,
+  PLATFORM_NOTIFICATION_ACTION_TYPE_TEXT,
+};
+
+// A notification action (button or text input); corresponds to Blink
+// WebNotificationAction.
 struct CONTENT_EXPORT PlatformNotificationAction {
   PlatformNotificationAction();
   ~PlatformNotificationAction();
 
+  // Type of the action (button or text input).
+  PlatformNotificationActionType type;
+
+  // Optional text to use as placeholder for text inputs. May be empty if it was
+  // not specified.
+  base::string16 placeholder;
+
   // Action name that the author can use to distinguish them.
   std::string action;