Add missing protocol to fix Xcode 12.5 warning (#7943)

paulb777 · web-flow · commit 9482fb41c745 · 2021-04-23T11:45:19.000-07:00
diff --git a/FirebaseDatabase/Sources/Login/FIRDatabaseConnectionContextProvider.h b/FirebaseDatabase/Sources/Login/FIRDatabaseConnectionContextProvider.h
@@ -56,7 +56,8 @@ NS_ASSUME_NONNULL_BEGIN
 
 @end
 
-@interface FIRDatabaseConnectionContextProvider : NSObject
+@interface FIRDatabaseConnectionContextProvider
+    : NSObject <FIRDatabaseConnectionContextProvider>
 
 + (id<FIRDatabaseConnectionContextProvider>)
     contextProviderWithAuth:(nullable id<FIRAuthInterop>)auth
