Allow origin trials to be enabled by script

third_party/WebKit/Source/bindings/core/v8/V8PerContextData.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 152 matching lines @@
   if (constructor.IsEmpty())
     return v8::Local<v8::Object>();
   v8::Local<v8::Value> prototypeValue;
   if (!constructor->Get(context(), v8String(m_isolate, "prototype"))
            .ToLocal(&prototypeValue) ||
       !prototypeValue->IsObject())
     return v8::Local<v8::Object>();
   return prototypeValue.As<v8::Object>();
 }
 
+bool V8PerContextData::getExistingConstructorAndPrototypeForType(
+    const WrapperTypeInfo* type,
+    v8::Local<v8::Object>* prototypeObject,
+    v8::Local<v8::Function>* interfaceObject) {
+  *interfaceObject = m_constructorMap.Get(type);
+  if (interfaceObject->IsEmpty()) {
+    *prototypeObject = v8::Local<v8::Object>();
+    return false;
+  }
+  *prototypeObject = prototypeForType(type);

[haraken, 2017/01/28 02:25:20]

Shall we add DCHECK(!prototypeObject->IsEmpty())?

[chasej, 2017/01/30 19:15:56]

Done.

+  return true;
+}
+
 void V8PerContextData::addCustomElementBinding(
     std::unique_ptr<V0CustomElementBinding> binding) {
   m_customElementBindings.push_back(std::move(binding));
 }
 
 void V8PerContextData::setModulator(Modulator* modulator) {
   DCHECK(!m_modulator);
   DCHECK(modulator);
   m_modulator = modulator;
 }
 
 void V8PerContextData::clearModulator() {
   m_modulator = nullptr;
 }
 
 }  // namespace blink