First step in letting Crankshaft inline functions with a different context.

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index 417927f51ec127ab36bc33e3175fde79f94b9c6b..643f5f5d40fce1b3533446a6834ea8bc6a837e5e 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -1015,6 +1015,8 @@ LEnvironment* LChunkBuilder::CreateEnvironment(HEnvironment* hydrogen_env) {
                                           outer);
   int argument_index = 0;
   for (int i = 0; i < value_count; ++i) {
+    if (hydrogen_env->is_special_index(i)) continue;
+
     HValue* value = hydrogen_env->values()->at(i);
     LOperand* op = NULL;
     if (value->IsArgumentsObject()) {