[stubs] Cleanup usages of lambdas in CodeStubAssembler and friends.

src/code-stubs.cc

Index: src/code-stubs.cc
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
index 8600350d0f38d5d081c1c203a923a0dcc296bffc..4d8aa69e0f5add2cd586eb408c5380a8a0cc68b4 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -2626,7 +2626,7 @@ compiler::Node* FastNewFunctionContextStub::Generate(
   Node* undefined = assembler->UndefinedConstant();
   assembler->BuildFastFixedArrayForEach(
       function_context, FAST_ELEMENTS, min_context_slots, length,
-      [undefined](CodeStubAssembler* assembler, Node* context, Node* offset) {
+      [assembler, undefined](Node* context, Node* offset) {
         assembler->StoreNoWriteBarrier(MachineType::PointerRepresentation(),
                                        context, offset, undefined);
       });