[Bindings] Simplify V8PrivateProperty::Symbol methods

third_party/WebKit/Source/bindings/core/v8/V8PrivateProperty.cpp

 // Copyright 2016 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 "bindings/core/v8/V8PrivateProperty.h"
 
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "bindings/core/v8/V8Binding.h"
 #include "bindings/core/v8/V8BindingMacros.h"
 
 namespace blink {
 
 v8::Local<v8::Value> V8PrivateProperty::Symbol::getFromMainWorld(
-    ScriptState* scriptState,
     ScriptWrappable* scriptWrappable) {
-  v8::Local<v8::Object> wrapper =
-      scriptWrappable->mainWorldWrapper(scriptState->isolate());
-  return wrapper.IsEmpty() ? v8::Local<v8::Value>()
-                           : get(scriptState->context(), wrapper);
+  v8::Local<v8::Object> wrapper = scriptWrappable->mainWorldWrapper(m_isolate);
+  return wrapper.IsEmpty() ? v8::Local<v8::Value>() : getOrEmpty(wrapper);
 }
 
 v8::Local<v8::Private> V8PrivateProperty::createV8Private(v8::Isolate* isolate,
                                                           const char* symbol,
                                                           size_t length) {
   v8::Local<v8::String> str =
       v8::String::NewFromOneByte(
           isolate, reinterpret_cast<const uint8_t*>(symbol),
           v8::NewStringType::kNormal, static_cast<int>(length))
           .ToLocalChecked();
   return v8::Private::New(isolate, str);
 }
 
 }  // namespace blink