Add complete ElementKind information directly to Map for objects with elements.

src/ia32/macro-assembler-ia32.h

Index: src/ia32/macro-assembler-ia32.h
diff --git a/src/ia32/macro-assembler-ia32.h b/src/ia32/macro-assembler-ia32.h
index 4805a07e93e96c9ae7fdb585c29a42f42a4283dc..3a9df10b1757d5a3d4b932e25005bb5983ffee28 100644
--- a/src/ia32/macro-assembler-ia32.h
+++ b/src/ia32/macro-assembler-ia32.h
@@ -215,6 +215,12 @@ class MacroAssembler: public Assembler {
   // Compare instance type for map.
   void CmpInstanceType(Register map, InstanceType type);
 
+  // Check if a map for a JSObject indicates that the object has fast elements.
+  // Jump to the specified label if it does not.
+  void CheckFastElements(Register map,
+                         Label* fail,
+                         Label::Distance distance = Label::kFar);
+
   // Check if the map of an object is equal to a specified map and branch to
   // label if not. Skip the smi check if not required (object is known to be a
   // heap object)