Plumb Blink notification actions to button UI on desktop

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 40bd98d0873aab72df91fb7682101fcc6ad6bfd2..a5fe7dacbf087e1129a89a7ffd83db601e926ef6 100644
--- a/content/public/common/platform_notification_data.h
+++ b/content/public/common/platform_notification_data.h
@@ -10,6 +10,7 @@
 
 #include "base/strings/string16.h"
 #include "content/common/content_export.h"
+#include "content/public/common/platform_notification_action.h"
 #include "url/gurl.h"
 
 namespace content {
@@ -62,6 +63,9 @@ struct CONTENT_EXPORT PlatformNotificationData {
   // Developer-provided data associated with the notification, in the form of
   // 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