Cleanups needed for this-scoping in arrow functions

src/arm/lithium-codegen-arm.cc

Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index f2d50575731e08fc7a576963cbda5a03c272fb45..7050ff03533a32a7eccad0656d7c2e3454969587 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -121,7 +121,7 @@ bool LCodeGen::GeneratePrologue() {
     // global proxy when called as functions (without an explicit receiver
     // object).
     if (info_->this_has_uses() && is_sloppy(info_->language_mode()) &&
-        !info_->is_native()) {
+        !info_->is_native() && info_->scope()->has_this_declaration()) {
       Label ok;
       int receiver_offset = info_->scope()->num_parameters() * kPointerSize;
       __ ldr(r2, MemOperand(sp, receiver_offset));