Introduce FieldIndex to unify and abstract property/field offset

src/stub-cache.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_STUB_CACHE_H_
 #define V8_STUB_CACHE_H_
 
 #include "src/allocation.h"
 #include "src/arguments.h"
 #include "src/code-stubs.h"
@@ skipping 500 matching lines @@
                    ExtraICState extra_ic_state = kNoExtraICState,
                    InlineCacheHolderFlag cache_holder = OWN_MAP,
                    Code::Kind kind = Code::LOAD_IC)
       : BaseLoadStoreStubCompiler(isolate, kind, extra_ic_state,
                                   cache_holder) { }
   virtual ~LoadStubCompiler() { }
 
   Handle<Code> CompileLoadField(Handle<HeapType> type,
                                 Handle<JSObject> holder,
                                 Handle<Name> name,
-                                PropertyIndex index,
+                                FieldIndex index,
                                 Representation representation);
 
   Handle<Code> CompileLoadCallback(Handle<HeapType> type,
                                    Handle<JSObject> holder,
                                    Handle<Name> name,
                                    Handle<ExecutableAccessorInfo> callback);
 
   Handle<Code> CompileLoadCallback(Handle<HeapType> type,
                                    Handle<JSObject> holder,
                                    Handle<Name> name,
@@ skipping 50 matching lines @@
                                    Register object_reg,
                                    Handle<JSObject> holder,
                                    Handle<Name> name,
                                    Handle<Object> callback);
   void NonexistentHandlerFrontend(Handle<HeapType> type,
                                   Handle<JSObject> last,
                                   Handle<Name> name);
 
   void GenerateLoadField(Register reg,
                          Handle<JSObject> holder,
-                         PropertyIndex field,
+                         FieldIndex field,
                          Representation representation);
   void GenerateLoadConstant(Handle<Object> value);
   void GenerateLoadCallback(Register reg,
                             Handle<ExecutableAccessorInfo> callback);
   void GenerateLoadCallback(const CallOptimization& call_optimization,
                             Handle<Map> receiver_map);
   void GenerateLoadInterceptor(Register holder_reg,
                                Handle<Object> object,
                                Handle<JSObject> holder,
                                LookupResult* lookup,
@@ skipping 223 matching lines @@
   Handle<JSFunction> constant_function_;
   bool is_simple_api_call_;
   Handle<FunctionTemplateInfo> expected_receiver_type_;
   Handle<CallHandlerInfo> api_call_info_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_STUB_CACHE_H_