Use new LazyDataProperty API for DOM constructors

third_party/WebKit/Source/bindings/core/v8/V8DOMConfiguration.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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 84 matching lines @@
                                v8::Local<v8::ObjectTemplate> instanceTemplate,
                                v8::Local<v8::ObjectTemplate> prototypeTemplate,
                                const AttributeConfiguration&);
 
   static void installAttribute(v8::Isolate*,
                                const DOMWrapperWorld&,
                                v8::Local<v8::Object> instance,
                                v8::Local<v8::Object> prototype,
                                const AttributeConfiguration&);
 
+  // A lazy data attribute is like one of the attributes added via
+  // installAttributes(), however, V8 will attempt to replace it with the value
+  // returned by the getter callback, turning it into a real data value.
+  //
+  // This also means that the AttributeConfiguration must not specify a setter,
+  // nor any non-default attributes or access control settings.
+  static void installLazyDataAttributes(
+      v8::Isolate*,
+      const DOMWrapperWorld&,
+      v8::Local<v8::ObjectTemplate> instanceTemplate,
+      v8::Local<v8::ObjectTemplate> prototypeTemplate,
+      const AttributeConfiguration*,
+      size_t attributeCount);
+
   // AccessorConfiguration translates into calls to SetAccessorProperty()
   // on prototype ObjectTemplate.
   struct AccessorConfiguration {
     AccessorConfiguration& operator=(const AccessorConfiguration&) = delete;
     DISALLOW_NEW();
     const char* const name;
     v8::FunctionCallback getter;
     v8::FunctionCallback setter;
     v8::FunctionCallback getterForMainWorld;
     v8::FunctionCallback setterForMainWorld;
@@ skipping 177 matching lines @@
   // Sets the class string of platform objects, interface prototype objects,
   // etc.  See also http://heycam.github.io/webidl/#dfn-class-string
   static void setClassString(v8::Isolate*,
                              v8::Local<v8::ObjectTemplate>,
                              const char* classString);
 };
 
 }  // namespace blink
 
 #endif  // V8DOMConfiguration_h