Allow origin trials to be enabled by script

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

 /*
  * 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 67 matching lines @@
     return !boilerplate.IsEmpty() ? boilerplate->Clone()
                                   : createWrapperFromCacheSlowCase(type);
   }
 
   v8::Local<v8::Function> constructorForType(const WrapperTypeInfo* type) {
     v8::Local<v8::Function> interfaceObject = m_constructorMap.Get(type);
     return (!interfaceObject.IsEmpty()) ? interfaceObject
                                         : constructorForTypeSlowCase(type);
   }
 
+  // Retrieve the constructor for a type, but only if it already exists (avoids
+  // triggering initialization, as in constructorForType). If the constructor is
+  // not found, the return value is non-null, but empty (IsEmpty()).
+  v8::Local<v8::Function> constructorForTypeFromCache(
+      const WrapperTypeInfo* type) {
+    return m_constructorMap.Get(type);
+  }
+
   v8::Local<v8::Object> prototypeForType(const WrapperTypeInfo*);
 
   void addCustomElementBinding(std::unique_ptr<V0CustomElementBinding>);
 
   V8DOMActivityLogger* activityLogger() const { return m_activityLogger; }
   void setActivityLogger(V8DOMActivityLogger* activityLogger) {
     m_activityLogger = activityLogger;
   }
 
   Modulator* modulator() const { return m_modulator.get(); }
@@ skipping 29 matching lines @@
 
   // This is owned by a static hash map in V8DOMActivityLogger.
   V8DOMActivityLogger* m_activityLogger;
 
   Persistent<Modulator> m_modulator;
 };
 
 }  // namespace blink
 
 #endif  // V8PerContextData_h