[interpreter] Switch passing of new.target to register.

src/runtime/runtime-function.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/runtime/runtime-utils.h"
 
 #include "src/accessors.h"
 #include "src/arguments.h"
 #include "src/compiler.h"
 #include "src/deoptimizer.h"
@@ skipping 567 matching lines @@
         isolate, argv[i], Object::GetElement(isolate, arguments, offset + i));
   }
 
   Handle<Object> result;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
       isolate, result, Execution::Call(isolate, fun, receiver, argc, argv));
   return *result;
 }
 
 
-RUNTIME_FUNCTION(Runtime_GetNewTarget) {
-  SealHandleScope shs(isolate);
-  DCHECK(args.length() == 0);
-  JavaScriptFrameIterator it(isolate);
-  JavaScriptFrame* frame = it.frame();
-  // TODO(4544): By now the runtime function is only used by the interpreter,
-  // get rid of the entire runtime function once the interpreter is switched.
-  DCHECK(!frame->is_optimized() && !frame->HasInlinedFrames());
-  return frame->IsConstructor() ? frame->GetNewTarget()
-                                : isolate->heap()->undefined_value();
-}
-
-
 // ES6 section 9.2.1.2, OrdinaryCallBindThis for sloppy callee.
 RUNTIME_FUNCTION(Runtime_ConvertReceiver) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 0);
   if (receiver->IsNull() || receiver->IsUndefined()) {
     return isolate->global_proxy();
   }
   return *Object::ToObject(isolate, receiver).ToHandleChecked();
 }
@@ skipping 20 matching lines @@
 
 RUNTIME_FUNCTION(Runtime_ThrowStrongModeTooFewArguments) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 0);
   THROW_NEW_ERROR_RETURN_FAILURE(isolate,
                                  NewTypeError(MessageTemplate::kStrongArity));
 }
 
 }  // namespace internal
 }  // namespace v8