Replace HeapType with a non-templated FieldType class.

src/crankshaft/hydrogen.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_CRANKSHAFT_HYDROGEN_H_
 #define V8_CRANKSHAFT_HYDROGEN_H_
 
 #include "src/accessors.h"
 #include "src/allocation.h"
 #include "src/ast/ast.h"
@@ skipping 2626 matching lines @@
 
    private:
     Handle<Object> GetConstantFromMap(Handle<Map> map) const {
       DCHECK_EQ(DESCRIPTOR_TYPE, lookup_type_);
       DCHECK(number_ < map->NumberOfOwnDescriptors());
       return handle(map->instance_descriptors()->GetValue(number_), isolate());
     }
     Handle<Object> GetAccessorsFromMap(Handle<Map> map) const {
       return GetConstantFromMap(map);
     }
-    Handle<HeapType> GetFieldTypeFromMap(Handle<Map> map) const {
+    Handle<FieldType> GetFieldTypeFromMap(Handle<Map> map) const {
       DCHECK(IsFound());
       DCHECK(number_ < map->NumberOfOwnDescriptors());
       return handle(map->instance_descriptors()->GetFieldType(number_),
                     isolate());
     }
     Handle<Map> GetFieldOwnerFromMap(Handle<Map> map) const {
       DCHECK(IsFound());
       DCHECK(number_ < map->NumberOfOwnDescriptors());
       return handle(map->FindFieldOwner(number_));
     }
@@ skipping 406 matching lines @@
 
  private:
   HGraphBuilder* builder_;
 };
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_CRANKSHAFT_HYDROGEN_H_