Make whether or not a Code object should be created by masm explicit

src/ppc/code-stubs-ppc.h

Index: src/ppc/code-stubs-ppc.h
diff --git a/src/ppc/code-stubs-ppc.h b/src/ppc/code-stubs-ppc.h
index ef4bdce5d161a56db6a02ac692a3ccce9929356c..3228ad107e8116a5a9de0acda971b94b0fd5d262 100644
--- a/src/ppc/code-stubs-ppc.h
+++ b/src/ppc/code-stubs-ppc.h
@@ -127,8 +127,8 @@ class RecordWriteStub : public PlatformCodeStub {
   }
 
   static void Patch(Code* stub, Mode mode) {
-    MacroAssembler masm(NULL, stub->instruction_start(),
-                        stub->instruction_size());
+    MacroAssembler masm(stub->GetIsolate(), stub->instruction_start(),
+                        stub->instruction_size(), false);
     switch (mode) {
       case STORE_BUFFER_ONLY:
         DCHECK(GetMode(stub) == INCREMENTAL ||