Remove recently introduced FunctionType vm class by merging it into class Type.

runtime/vm/raw_object.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/raw_object.h"
 
 #include "vm/class_table.h"
 #include "vm/dart.h"
 #include "vm/freelist.h"
 #include "vm/isolate.h"
@@ skipping 325 matching lines @@
 }
 
 
 intptr_t RawType::VisitTypePointers(
     RawType* raw_obj, ObjectPointerVisitor* visitor) {
   visitor->VisitPointers(raw_obj->from(), raw_obj->to());
   return Type::InstanceSize();
 }
 
 
-intptr_t RawFunctionType::VisitFunctionTypePointers(
-    RawFunctionType* raw_obj, ObjectPointerVisitor* visitor) {
-  visitor->VisitPointers(raw_obj->from(), raw_obj->to());
-  return FunctionType::InstanceSize();
-}
-
-
 intptr_t RawTypeRef::VisitTypeRefPointers(
     RawTypeRef* raw_obj, ObjectPointerVisitor* visitor) {
   visitor->VisitPointers(raw_obj->from(), raw_obj->to());
   return TypeRef::InstanceSize();
 }
 
 
 intptr_t RawTypeParameter::VisitTypeParameterPointers(
     RawTypeParameter* raw_obj, ObjectPointerVisitor* visitor) {
   visitor->VisitPointers(raw_obj->from(), raw_obj->to());
@@ skipping 598 matching lines @@
 intptr_t RawUserTag::VisitUserTagPointers(
     RawUserTag* raw_obj, ObjectPointerVisitor* visitor) {
   // Make sure that we got here with the tagged pointer as this.
   ASSERT(raw_obj->IsHeapObject());
   visitor->VisitPointers(raw_obj->from(), raw_obj->to());
   return UserTag::InstanceSize();
 }
 
 
 }  // namespace dart