Revert of [turbofan] inline %StringIteratorPrototype%.next in JSBuiltinReducer.

src/compiler/access-builder.h

 // 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.
 
 #ifndef V8_COMPILER_ACCESS_BUILDER_H_
 #define V8_COMPILER_ACCESS_BUILDER_H_
 
 #include "src/compiler/simplified-operator.h"
 #include "src/elements-kind.h"
 
@@ skipping 164 matching lines @@
 
   // Provides access to SeqTwoByteString characters.
   static ElementAccess ForSeqTwoByteStringCharacter();
 
   // Provides access to JSGlobalObject::global_proxy() field.
   static FieldAccess ForJSGlobalObjectGlobalProxy();
 
   // Provides access to JSGlobalObject::native_context() field.
   static FieldAccess ForJSGlobalObjectNativeContext();
 
-  // Provides access to JSStringIterator::string() field.
-  static FieldAccess ForJSStringIteratorString();
-
-  // Provides access to JSStringIterator::index() field.
-  static FieldAccess ForJSStringIteratorIndex();
-
   // Provides access to JSValue::value() field.
   static FieldAccess ForValue();
 
   // Provides access to arguments object fields.
   static FieldAccess ForArgumentsLength();
   static FieldAccess ForArgumentsCallee();
 
   // Provides access to FixedArray slots.
   static FieldAccess ForFixedArraySlot(size_t index);
 
@@ skipping 17 matching lines @@
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(AccessBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_ACCESS_BUILDER_H_