Use platform specific stubs for vector-based Load/KeyedLoad.

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 8ddcd8b04fc7a8d0cf4171f598cf2ba50ecfc65f..e3560df1e4f26248eaa4b3480021258d0c61e1be 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -8782,11 +8782,11 @@ class Name: public HeapObject {
 // ES6 symbols.
 class Symbol: public Name {
  public:
-  // [name]: the print name of a symbol, or undefined if none.
-  DECL_ACCESSORS(name, Object)
-
   DECL_ACCESSORS(flags, Smi)
 
+  // [name]: the print name of a symbol, or undefined if none
+  DECL_ACCESSORS(name, Object)
+
   // [is_private]: whether this is a private symbol.
   DECL_BOOLEAN_ACCESSORS(is_private)
 
@@ -8801,11 +8801,12 @@ class Symbol: public Name {
   DECLARE_VERIFIER(Symbol)
 
   // Layout description.
-  static const int kNameOffset = Name::kSize;
-  static const int kFlagsOffset = kNameOffset + kPointerSize;
-  static const int kSize = kFlagsOffset + kPointerSize;
+  static const int kFlagsOffset = Name::kSize;

[Toon Verwaest, 2015/03/11 17:55:02]

Is this still necessary?
[At this point haven't looked at platform specific files yet, but I seem to
recall that this idea was discarded]

[mvstanton, 2015/03/12 17:05:34]

Yes, I still want to do something in here but I'll move it out to a future CL.

+  static const int kNameOffset = kFlagsOffset + kPointerSize;
+  static const int kSize = kNameOffset + kPointerSize;
 
-  typedef FixedBodyDescriptor<kNameOffset, kFlagsOffset, kSize> BodyDescriptor;
+  typedef FixedBodyDescriptor<kFlagsOffset, kNameOffset + kPointerSize, kSize>
+      BodyDescriptor;
 
   void SymbolShortPrint(std::ostream& os);