Better support for 'polymorphic' JS and external arrays

src/objects.h

Index: src/objects.h
diff --git a/src/objects.h b/src/objects.h
index 77aab244709a31870a5e36578f2631d78596cf07..76a29cf3a94d7c90da19b7671e571203cf09b035 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -30,6 +30,7 @@
 
 #include "allocation.h"
 #include "builtins.h"
+#include "list.h"
 #include "smart-pointer.h"
 #include "unicode-inl.h"
 #if V8_TARGET_ARCH_ARM
@@ -3271,12 +3272,10 @@ class Code: public HeapObject {
     BUILTIN,
     LOAD_IC,
     KEYED_LOAD_IC,
-    KEYED_EXTERNAL_ARRAY_LOAD_IC,
     CALL_IC,
     KEYED_CALL_IC,
     STORE_IC,
     KEYED_STORE_IC,
-    KEYED_EXTERNAL_ARRAY_STORE_IC,
     TYPE_RECORDING_UNARY_OP_IC,
     TYPE_RECORDING_BINARY_OP_IC,
     COMPARE_IC,
@@ -3353,12 +3352,6 @@ class Code: public HeapObject {
     return kind() == TYPE_RECORDING_BINARY_OP_IC;
   }
   inline bool is_compare_ic_stub() { return kind() == COMPARE_IC; }
-  inline bool is_external_array_load_stub() {
-    return kind() == KEYED_EXTERNAL_ARRAY_LOAD_IC;
-  }
-  inline bool is_external_array_store_stub() {
-    return kind() == KEYED_EXTERNAL_ARRAY_STORE_IC;
-  }
 
   // [major_key]: For kind STUB or BINARY_OP_IC, the major key.
   inline int major_key();
@@ -6719,6 +6712,11 @@ class BooleanBit : public AllStatic {
   }
 };
 
+class Map;
+class Code;
+typedef List<Map*> MapList;
+typedef List<Code*> CodeList;
+
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_