[destructuring] Implement parameter pattern matching.

src/arm64/lithium-codegen-arm64.cc

Index: src/arm64/lithium-codegen-arm64.cc
diff --git a/src/arm64/lithium-codegen-arm64.cc b/src/arm64/lithium-codegen-arm64.cc
index ec6e3c7038c3d29ecbeec651ceb5d2848a261260..7c2675a589faab3139f35ed5de14e9e1c57147b9 100644
--- a/src/arm64/lithium-codegen-arm64.cc
+++ b/src/arm64/lithium-codegen-arm64.cc
@@ -682,7 +682,8 @@ bool LCodeGen::GeneratePrologue() {
     int num_parameters = scope()->num_parameters();
     int first_parameter = scope()->has_this_declaration() ? -1 : 0;
     for (int i = first_parameter; i < num_parameters; i++) {
-      Variable* var = (i == -1) ? scope()->receiver() : scope()->parameter(i);
+      Variable* var =
+          (i == -1) ? scope()->receiver() : scope()->parameter_var(i);
       if (var->IsContextSlot()) {
         Register value = x0;
         Register scratch = x3;