[Interpreter] Add support for new.target

src/interpreter/bytecode-generator.cc

Index: src/interpreter/bytecode-generator.cc
diff --git a/src/interpreter/bytecode-generator.cc b/src/interpreter/bytecode-generator.cc
index 25c7094dcef0470f721d088311c930e1849055db..02061a75145486fe8dd6b86310151329b7be91d0 100644
--- a/src/interpreter/bytecode-generator.cc
+++ b/src/interpreter/bytecode-generator.cc
@@ -2050,9 +2050,6 @@ void BytecodeGenerator::VisitThisFunctionVariable(Variable* variable) {
 void BytecodeGenerator::VisitNewTargetVariable(Variable* variable) {
   if (variable == nullptr) return;
 
-  // TODO(rmcilroy): Remove once we have tests which exercise this code path.
-  UNIMPLEMENTED();
-
   // Store the closure we were called with in the this_function_var.
   builder()->CallRuntime(Runtime::kGetOriginalConstructor, Register(), 0);
   VisitVariableAssignment(variable, FeedbackVectorSlot::Invalid());