Implement the ability to get all notifications in Chromium.

content/public/browser/platform_notification_context.h

Index: content/public/browser/platform_notification_context.h
diff --git a/content/public/browser/platform_notification_context.h b/content/public/browser/platform_notification_context.h
index 660ff19d018b5d43af7851f9bfc45878c91065ea..74dd47100144fec3f20e0d174528b26fc9b91b82 100644
--- a/content/public/browser/platform_notification_context.h
+++ b/content/public/browser/platform_notification_context.h
@@ -6,15 +6,15 @@
 #define CONTENT_PUBLIC_BROWSER_PLATFORM_NOTIFICATION_CONTEXT_H_
 
 #include <stdint.h>
+#include <vector>
 
 #include "base/callback.h"
+#include "content/public/browser/notification_database_data.h"
 
 class GURL;
 
 namespace content {
 
-struct NotificationDatabaseData;
-
 // Represents the storage context for persistent Web Notifications, specific to
 // the storage partition owning the instance. All methods defined in this
 // interface may only be used on the IO thread.
@@ -24,6 +24,10 @@ class PlatformNotificationContext {
       base::Callback<void(bool /* success */,
                           const NotificationDatabaseData&)>;
 
+  using ReadAllResultCallback =
+      base::Callback<void(bool /* success */,
+                          const std::vector<NotificationDatabaseData>&)>;
+
   using WriteResultCallback =
       base::Callback<void(bool /* success */,
                           int64_t /* notification_id */)>;
@@ -37,6 +41,14 @@ class PlatformNotificationContext {
                                     const GURL& origin,
                                     const ReadResultCallback& callback) = 0;
 
+  // Reads all data associated with |service_worker_registration_id| belonging
+  // to |origin| from the database. |callback| will be invoked with the success
+  // status and a vector with all read notification data when completed.
+  virtual void ReadAllNotificationDataForServiceWorkerRegistration(
+      const GURL& origin,
+      int64_t service_worker_registration_id,
+      const ReadAllResultCallback& callback) = 0;
+
   // Writes the data associated with a notification to a database. When this
   // action completed, |callback| will be invoked with the success status and
   // the persistent notification id when written successfully.