[wasm] Provide backoff implementations for the Fxx rounding instructions

src/api-experimental.cc

 // Copyright 2015 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.
 
 /**
  * Implementation for v8-experimental.h.
  */
 
 #include "src/api-experimental.h"
 
@@ skipping 104 matching lines @@
 void FastAccessorBuilder::SetLabel(LabelId label_id) {
   FromApi(this)->SetLabel(label_id);
 }
 
 
 void FastAccessorBuilder::CheckNotZeroOrJump(ValueId value_id,
                                              LabelId label_id) {
   FromApi(this)->CheckNotZeroOrJump(value_id, label_id);
 }
 
-
 FastAccessorBuilder::ValueId FastAccessorBuilder::Call(
     v8::FunctionCallback callback, ValueId value_id) {
   return FromApi(this)->Call(callback, value_id);
 }
 
 }  // namespace experimental
 }  // namespace v8