IndexedDB: Rely on bindings for enum validation

Source/modules/indexeddb/IDBObjectStore.cpp

Index: Source/modules/indexeddb/IDBObjectStore.cpp
diff --git a/Source/modules/indexeddb/IDBObjectStore.cpp b/Source/modules/indexeddb/IDBObjectStore.cpp
index 729becd6b56dba21e288e94b09522f49d628a803..00ffdbf043a6941116ec863014847a6d68ea0763 100644
--- a/Source/modules/indexeddb/IDBObjectStore.cpp
+++ b/Source/modules/indexeddb/IDBObjectStore.cpp
@@ -604,10 +604,7 @@ IDBRequest* IDBObjectStore::openCursor(ScriptState* scriptState, const ScriptVal
         return nullptr;
     }
 
-    WebIDBCursorDirection direction = IDBCursor::stringToDirection(directionString, exceptionState);
-    if (exceptionState.hadException())
-        return nullptr;
-
+    WebIDBCursorDirection direction = IDBCursor::stringToDirection(directionString);
     IDBKeyRange* keyRange = IDBKeyRange::fromScriptValue(scriptState->executionContext(), range, exceptionState);
     if (exceptionState.hadException())
         return nullptr;
@@ -645,10 +642,7 @@ IDBRequest* IDBObjectStore::openKeyCursor(ScriptState* scriptState, const Script
         return nullptr;
     }
 
-    WebIDBCursorDirection direction = IDBCursor::stringToDirection(directionString, exceptionState);
-    if (exceptionState.hadException())
-        return nullptr;
-
+    WebIDBCursorDirection direction = IDBCursor::stringToDirection(directionString);
     IDBKeyRange* keyRange = IDBKeyRange::fromScriptValue(scriptState->executionContext(), range, exceptionState);
     if (exceptionState.hadException())
         return nullptr;