(early draft) Strict mode - throw exception on assignment to read only property.

src/builtins.h

Index: src/builtins.h
diff --git a/src/builtins.h b/src/builtins.h
index 2733410ea942c6e7b607dee2e2974e3f2a22914e..f96856352d0621a6687ad6284f852a1a1b86f796 100644
--- a/src/builtins.h
+++ b/src/builtins.h
@@ -136,21 +136,26 @@ enum BuiltinExtraArguments {
   V(StoreIC_GlobalProxy,        STORE_IC, MEGAMORPHIC,                    \
                                 Code::kNoExtraICState)                    \
   V(StoreIC_Initialize_Strict,  STORE_IC, UNINITIALIZED,                  \
-                                StoreIC::kStoreICStrict)                  \
+                                kStrictMode)                              \
   V(StoreIC_ArrayLength_Strict, STORE_IC, MONOMORPHIC,                    \
-                                StoreIC::kStoreICStrict)                  \
+                                kStrictMode)                              \
   V(StoreIC_Normal_Strict,      STORE_IC, MONOMORPHIC,                    \
-                                StoreIC::kStoreICStrict)                  \
+                                kStrictMode)                              \
   V(StoreIC_Megamorphic_Strict, STORE_IC, MEGAMORPHIC,                    \
-                                StoreIC::kStoreICStrict)                  \
+                                kStrictMode)                              \
   V(StoreIC_GlobalProxy_Strict, STORE_IC, MEGAMORPHIC,                    \
-                                StoreIC::kStoreICStrict)                  \
+                                kStrictMode)                              \
                                                                           \
   V(KeyedStoreIC_Initialize,    KEYED_STORE_IC, UNINITIALIZED,            \
                                 Code::kNoExtraICState)                    \
   V(KeyedStoreIC_Generic,       KEYED_STORE_IC, MEGAMORPHIC,              \
                                 Code::kNoExtraICState)                    \
                                                                           \
+  V(KeyedStoreIC_Initialize_Strict,   KEYED_STORE_IC, UNINITIALIZED,      \
+                                kStrictMode)                              \
+  V(KeyedStoreIC_Generic_Strict,      KEYED_STORE_IC, MEGAMORPHIC,        \
+                                kStrictMode)                              \
+                                                                          \
   /* Uses KeyedLoadIC_Initialize; must be after in list. */               \
   V(FunctionCall,               BUILTIN, UNINITIALIZED,                   \
                                 Code::kNoExtraICState)                    \