port paths to FSTDocumentKey (#877)

* replace path with C++ implementation in FSTDocumentKey.{h,mm} only

* address changes

* address changes

1 files changed, 2 insertions, 3 deletions

diff --git a/Firestore/Source/Local/FSTMemoryRemoteDocumentCache.mm b/Firestore/Source/Local/FSTMemoryRemoteDocumentCache.mm
index 7d5e1e2..b0d6807 100644
--- a/Firestore/Source/Local/FSTMemoryRemoteDocumentCache.mm
+++ b/Firestore/Source/Local/FSTMemoryRemoteDocumentCache.mm
@@ -60,11 +60,10 @@ NS_ASSUME_NONNULL_BEGIN
 
   // Documents are ordered by key, so we can use a prefix scan to narrow down the documents
   // we need to match the query against.
-  FSTDocumentKey *prefix = [FSTDocumentKey
-      keyWithPath:[FSTResourcePath resourcePathWithCPPResourcePath:query.path.Append("")]];
+  FSTDocumentKey *prefix = [FSTDocumentKey keyWithPath:query.path.Append("")];
   NSEnumerator<FSTDocumentKey *> *enumerator = [self.docs keyEnumeratorFrom:prefix];
   for (FSTDocumentKey *key in enumerator) {
-    if (!query.path.IsPrefixOf([key.path toCPPResourcePath])) {
+    if (!query.path.IsPrefixOf(key.path)) {
       break;
     }
     FSTMaybeDocument *maybeDoc = self.docs[key];