Refactor incremental marking to use static visitor.

src/objects.cc

Index: src/objects.cc
diff --git a/src/objects.cc b/src/objects.cc
index 122550f5d5c42e8bbf55f0ea20202f2f2bdca999..9338d7acae8fe69c36a964aae5a05d7482dc82b7 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -1398,8 +1398,7 @@ void HeapObject::IterateBody(InstanceType type, int object_size,
     case EXTERNAL_DOUBLE_ARRAY_TYPE:
       break;
     case SHARED_FUNCTION_INFO_TYPE: {
-      SharedFunctionInfo* shared = reinterpret_cast<SharedFunctionInfo*>(this);
-      shared->SharedFunctionInfoIterateBody(v);
+      SharedFunctionInfo::BodyDescriptor::IterateBody(this, v);
       break;
     }
 
@@ -7910,12 +7909,6 @@ int SharedFunctionInfo::SearchOptimizedCodeMap(Context* global_context) {
 }
 
 
-void SharedFunctionInfo::SharedFunctionInfoIterateBody(ObjectVisitor* v) {
-  v->VisitSharedFunctionInfo(this);
-  SharedFunctionInfo::BodyDescriptor::IterateBody(this, v);
-}
-
-
 #define DECLARE_TAG(ignore1, name, ignore2) name,
 const char* const VisitorSynchronization::kTags[
     VisitorSynchronization::kNumberOfSyncTags] = {