[BackgroundSync] Add browser side support for SyncRegistration.done

content/browser/background_sync/background_sync_registration_handle.h

Index: content/browser/background_sync/background_sync_registration_handle.h
diff --git a/content/browser/background_sync/background_sync_registration_handle.h b/content/browser/background_sync/background_sync_registration_handle.h
index 564bd584dc6dc6946696d8ff256ff4bae79a471a..bf35ac088f5d6deb0bd2a4d49917968d88a2cf10 100644
--- a/content/browser/background_sync/background_sync_registration_handle.h
+++ b/content/browser/background_sync/background_sync_registration_handle.h
@@ -10,6 +10,7 @@
 #include "base/memory/weak_ptr.h"
 #include "content/browser/background_sync/background_sync_registration.h"
 #include "content/browser/background_sync/background_sync_status.h"
+#include "content/common/background_sync_service.mojom.h"
 #include "content/common/content_export.h"
 
 namespace content {
@@ -25,6 +26,8 @@ class CONTENT_EXPORT BackgroundSyncRegistrationHandle {
  public:
   using HandleId = int;
   using StatusCallback = base::Callback<void(BackgroundSyncStatus)>;
+  using StatusAndStateCallback =
+      base::Callback<void(BackgroundSyncStatus, BackgroundSyncState)>;
 
   ~BackgroundSyncRegistrationHandle();
 
@@ -42,6 +45,13 @@ class CONTENT_EXPORT BackgroundSyncRegistrationHandle {
   // with BACKGROUND_SYNC_STATUS_OK if it succeeds.
   void Unregister(int64_t service_worker_id, const StatusCallback& callback);
 
+  // Runs |callback| when the registration associated with |handle_id|
+  // completes.The provided status is BACKGROUND_SYNC_STATUS_OK if the operation
+  // succeeded. The provided state is BACKGROUND_SYNC_STATE_SUCCESS on success,
+  // *_STATE_FAILED on final failure, and *_STATE_UNREGISTERED if the

[iclelland, 2015/09/17 13:48:09]

Is * just 'tired of typing', or does it match something else besides
'BACKGROUND_SYNC'?

[jkarlin, 2015/09/17 17:40:25]

Done.

+  // registration was unregistered before it could complete.
+  void NotifyWhenDone(const StatusAndStateCallback& callback);
+
   // Returns true if the handle is backed by a BackgroundSyncRegistration in the
   // BackgroundSyncManager.
   bool IsValid() const;