Revert of [turbofan] Do not use the self reference for turbofan functions.

src/codegen.cc

Index: src/codegen.cc
diff --git a/src/codegen.cc b/src/codegen.cc
index 35201394f06da448d4b811ae16d69a48116a14b5..d4c1e438cb3654212f10476e2eeef15d44241d3e 100644
--- a/src/codegen.cc
+++ b/src/codegen.cc
@@ -120,8 +120,7 @@
 
 Handle<Code> CodeGenerator::MakeCodeEpilogue(MacroAssembler* masm,
                                              EhFrameWriter* eh_frame_writer,
-                                             CompilationInfo* info,
-                                             Handle<Object> self_reference) {
+                                             CompilationInfo* info) {
   Isolate* isolate = info->isolate();
 
   // Allocate and install the code.
@@ -132,9 +131,11 @@
       info->IsStub();
   masm->GetCode(&desc);
   if (eh_frame_writer) eh_frame_writer->GetEhFrame(&desc);
-  Handle<Code> code = isolate->factory()->NewCode(
-      desc, flags, self_reference, false, is_crankshafted,
-      info->prologue_offset(), info->is_debug() && !is_crankshafted);
+  Handle<Code> code =
+      isolate->factory()->NewCode(desc, flags, masm->CodeObject(),
+                                  false, is_crankshafted,
+                                  info->prologue_offset(),
+                                  info->is_debug() && !is_crankshafted);
   isolate->counters()->total_compiled_code_size()->Increment(
       code->instruction_size());
   isolate->heap()->IncrementCodeGeneratedBytes(is_crankshafted,