Merge arguments branch to bleeding merge.

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 984d4eb0a8f007041417c31004b15af4565afd5a..2832e1ea320aca9ff6269aa54f5ae1eb610af9b2 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -2502,6 +2502,7 @@ void LCodeGen::DoLoadKeyedSpecializedArrayElement(
       case JSObject::FAST_ELEMENTS:
       case JSObject::FAST_DOUBLE_ELEMENTS:
       case JSObject::DICTIONARY_ELEMENTS:
+      case JSObject::NON_STRICT_ARGUMENTS_ELEMENTS:
         UNREACHABLE();
         break;
     }
@@ -3238,6 +3239,7 @@ void LCodeGen::DoStoreKeyedSpecializedArrayElement(
       case JSObject::FAST_ELEMENTS:
       case JSObject::FAST_DOUBLE_ELEMENTS:
       case JSObject::DICTIONARY_ELEMENTS:
+      case JSObject::NON_STRICT_ARGUMENTS_ELEMENTS:
         UNREACHABLE();
         break;
     }