[es6] Consistently use %_GetSuperConstructor to implement super calls.

src/full-codegen/full-codegen.cc

 // Copyright 2012 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/full-codegen/full-codegen.h"
 
 #include "src/ast/ast.h"
 #include "src/ast/ast-numbering.h"
 #include "src/ast/prettyprinter.h"
 #include "src/ast/scopeinfo.h"
@@ skipping 902 matching lines @@
 
 void FullCodeGenerator::EmitPropertyKey(ObjectLiteralProperty* property,
                                         BailoutId bailout_id) {
   VisitForStackValue(property->key());
   __ CallRuntime(Runtime::kToName, 1);
   PrepareForBailoutForId(bailout_id, NO_REGISTERS);
   __ Push(result_register());
 }
 
 
-void FullCodeGenerator::EmitLoadSuperConstructor(SuperCallReference* ref) {
-  VisitForStackValue(ref->this_function_var());
-  __ CallRuntime(Runtime::kGetPrototype, 1);
-}
-
-
 void FullCodeGenerator::VisitReturnStatement(ReturnStatement* stmt) {
   Comment cmnt(masm_, "[ ReturnStatement");
   SetStatementPosition(stmt);
   Expression* expr = stmt->expression();
   VisitForAccumulatorValue(expr);
   EmitUnwindBeforeReturn();
   EmitReturnSequence();
 }
 
 
@@ skipping 797 matching lines @@
   return var->mode() == CONST_LEGACY || var->scope()->is_nonlinear() ||
          var->initializer_position() >= proxy->position();
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8