binding: Reimplements V8HiddenValue as V8PrivateProperty.

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"
+
+namespace blink {
+
+v8::Local<v8::Value> V8PrivateProperty::Symbol::getFromMainWorld(ScriptState* scriptState, ScriptWrappable* scriptWrappable)
+{
+    v8::Local<v8::Object> wrapper = scriptWrappable->newLocalWrapper(scriptState->isolate());
+    return wrapper.IsEmpty() ? v8::Local<v8::Value>() : get(scriptState->context(), wrapper);
+}
+
+v8::Local<v8::Private> V8PrivateProperty::createV8Private(v8::Isolate* isolate, const char* symbol, size_t length)
+{
+    v8::Local<v8::String> str;
+    if (!LIKELY(v8::String::NewFromOneByte(isolate, reinterpret_cast<const uint8_t*>(symbol), v8::NewStringType::kNormal, static_cast<int>(length)).ToLocal(&str))) {

[haraken, 2016/05/24 17:33:53]

Can we use v8CallOrCrash?

[Yuki, 2016/05/26 10:52:11]

Done.

+        // Immediately crashes when NewFromOneByte() fails because it only fails
+        // the given string is too long.
+        RELEASE_NOTREACHED();
+        return v8::Local<v8::Private>();
+    }
+    return v8::Private::ForApi(isolate, str);
+}
+
+} // namespace blink