Merge arguments branch to bleeding edge (second try).

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index 27bd92bb204e13a397d999df8a2863a3083b8855..8bde2ce59557481ad0b3a6306f8a787ba5cbc161 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -2504,6 +2504,7 @@ void LCodeGen::DoLoadKeyedSpecializedArrayElement(
       case JSObject::FAST_ELEMENTS:
       case JSObject::FAST_DOUBLE_ELEMENTS:
       case JSObject::DICTIONARY_ELEMENTS:
+      case JSObject::NON_STRICT_ARGUMENTS_ELEMENTS:
         UNREACHABLE();
         break;
     }
@@ -3240,6 +3241,7 @@ void LCodeGen::DoStoreKeyedSpecializedArrayElement(
       case JSObject::FAST_ELEMENTS:
       case JSObject::FAST_DOUBLE_ELEMENTS:
       case JSObject::DICTIONARY_ELEMENTS:
+      case JSObject::NON_STRICT_ARGUMENTS_ELEMENTS:
         UNREACHABLE();
         break;
     }