[Fetch API] Remove HandleScope to protect local handles

third_party/WebKit/Source/modules/fetch/Request.cpp

 // Copyright 2014 The Chromium 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 "modules/fetch/Request.h"
 
 #include "bindings/core/v8/Dictionary.h"
 #include "core/dom/Document.h"
 #include "core/dom/ExecutionContext.h"
 #include "core/fetch/FetchUtils.h"
@@ skipping 660 matching lines @@
     // to plumb this information in to here.
 }
 
 String Request::mimeType() const
 {
     return m_request->mimeType();
 }
 
 void Request::refreshBody(ScriptState* scriptState)
 {
-    ScriptState::Scope scope(scriptState);
     v8::Local<v8::Value> bodyBuffer = toV8(this->bodyBuffer(), scriptState);
     v8::Local<v8::Value> request = toV8(this, scriptState);
     if (request.IsEmpty()) {
         // |toV8| can return an empty handle when the worker is terminating.
         // We don't want the renderer to crash in such cases.
         // TODO(yhirano): Delete this block after the graceful shutdown
         // mechanism is introduced.
         return;
     }
     DCHECK(request->IsObject());
     V8HiddenValue::setHiddenValue(scriptState, request.As<v8::Object>(), V8HiddenValue::internalBodyBuffer(scriptState->isolate()), bodyBuffer);
 }
 
 DEFINE_TRACE(Request)
 {
     Body::trace(visitor);
     visitor->trace(m_request);
     visitor->trace(m_headers);
 }
 
 } // namespace blink