Switch V8HiddenValue from hidden values to privates

third_party/WebKit/Source/bindings/core/v8/V8HiddenValue.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 "config.h"
 #include "bindings/core/v8/V8HiddenValue.h"
 
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "bindings/core/v8/V8Binding.h"
 
 namespace blink {
 
 #define V8_DEFINE_METHOD(name) \
 v8::Local<v8::String> V8HiddenValue::name(v8::Isolate* isolate)    \
 { \
     V8HiddenValue* hiddenValue = V8PerIsolateData::from(isolate)->hiddenValue(); \
     if (hiddenValue->m_##name.isEmpty()) { \
         hiddenValue->m_##name.set(isolate, v8AtomicString(isolate, #name)); \
     } \
     return hiddenValue->m_##name.newLocal(isolate); \
 }
 
 V8_HIDDEN_VALUES(V8_DEFINE_METHOD);
 
 v8::Local<v8::Value> V8HiddenValue::getHiddenValue(ScriptState* scriptState, v8::Local<v8::Object> object, v8::Local<v8::String> key)
 {
-    return object->GetHiddenValue(key);
+    v8::Local<v8::Context> context = scriptState->context();
+    v8::Local<v8::Private> privateKey = v8::Private::ForApi(scriptState->isolate(), key);
+    v8::Local<v8::Value> value;
+    // Callsites interpret an empty handle has absence of a result.
+    if (!v8CallBoolean(object->HasPrivate(context, privateKey)))
+        return v8::Local<v8::Value>();
+    if (object->GetPrivate(context, privateKey).ToLocal(&value))
+        return value;
+    return v8::Local<v8::Value>();
 }
 
 bool V8HiddenValue::setHiddenValue(ScriptState* scriptState, v8::Local<v8::Object> object, v8::Local<v8::String> key, v8::Local<v8::Value> value)
 {
-    return object->SetHiddenValue(key, value);
+    return v8CallBoolean(object->SetPrivate(scriptState->context(), v8::Private::ForApi(scriptState->isolate(), key), value));
 }
 
 bool V8HiddenValue::deleteHiddenValue(ScriptState* scriptState, v8::Local<v8::Object> object, v8::Local<v8::String> key)
 {
-    return object->DeleteHiddenValue(key);
+    return v8CallBoolean(object->DeletePrivate(scriptState->context(), v8::Private::ForApi(scriptState->isolate(), key)));
 }
 
 v8::Local<v8::Value> V8HiddenValue::getHiddenValueFromMainWorldWrapper(ScriptState* scriptState, ScriptWrappable* wrappable, v8::Local<v8::String> key)
 {
     v8::Local<v8::Object> wrapper = wrappable->newLocalWrapper(scriptState->isolate());
     return wrapper.IsEmpty() ? v8::Local<v8::Value>() : getHiddenValue(scriptState, wrapper, key);
 }
 
 } // namespace blink