Make FastNewFunctionContextStub take slots parameter

src/code-factory.cc

Index: src/code-factory.cc
diff --git a/src/code-factory.cc b/src/code-factory.cc
index 63cd5d0765e6d5c6a55bba10316806eb8cf9260e..5078b19b030467639074fc2449140db4c5e1cfd7 100644
--- a/src/code-factory.cc
+++ b/src/code-factory.cc
@@ -471,8 +471,8 @@ Callable CodeFactory::FastCloneShallowObject(Isolate* isolate, int length) {
 
 
 // static
-Callable CodeFactory::FastNewContext(Isolate* isolate, int slot_count) {
-  FastNewFunctionContextStub stub(isolate, slot_count);
+Callable CodeFactory::FastNewFunctionContext(Isolate* isolate) {
+  FastNewFunctionContextStub stub(isolate);
   return make_callable(stub);
 }