Allow origin trials to be enabled by script

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

Index: third_party/WebKit/Source/bindings/core/v8/V8PerContextData.cpp
diff --git a/third_party/WebKit/Source/bindings/core/v8/V8PerContextData.cpp b/third_party/WebKit/Source/bindings/core/v8/V8PerContextData.cpp
index 2f2ff3968943803d2f9cb5135b898f2ffe3d21b5..a7d32d70a2727dda8ab4a5fcc74fb1b21dbbd17a 100644
--- a/third_party/WebKit/Source/bindings/core/v8/V8PerContextData.cpp
+++ b/third_party/WebKit/Source/bindings/core/v8/V8PerContextData.cpp
@@ -170,6 +170,19 @@ v8::Local<v8::Object> V8PerContextData::prototypeForType(
   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));