Remove CompilationInfo::MayUseThis() and replace it with what we really want to know: MustReplaceUn…

src/x64/lithium-codegen-x64.cc

Index: src/x64/lithium-codegen-x64.cc
diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
index 3a98fcb18b901460715975b09b93b911dc981af8..602a2d46b7a64a24571b60e2a994b66e9ca46a20 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -127,8 +127,7 @@ bool LCodeGen::GeneratePrologue() {
 
     // Sloppy mode functions need to replace the receiver with the global proxy
     // when called as functions (without an explicit receiver object).
-    if (is_sloppy(info()->language_mode()) && info()->MayUseThis() &&
-        !info()->is_native() && info()->scope()->has_this_declaration()) {
+    if (info()->MustReplaceUndefinedReceiverWithGlobalProxy()) {
       Label ok;
       StackArgumentsAccessor args(rsp, scope()->num_parameters());
       __ movp(rcx, args.GetReceiverOperand());