Expose a way to make a "same-origin" realm

src/d8.h

Index: src/d8.h
diff --git a/src/d8.h b/src/d8.h
index e51e8ee13fae98b3bcc7b3d3fab5421548213454..42816817250d464030a72e9d7f2bf9fd5c1a7647 100644
--- a/src/d8.h
+++ b/src/d8.h
@@ -371,10 +371,15 @@ class Shell : public i::AllStatic {
   static void PerformanceNow(const v8::FunctionCallbackInfo<v8::Value>& args);
 #endif  // !V8_SHARED
 
+  static MaybeLocal<Context> CreateRealm(

[adamk, 2016/05/27 18:10:51]

Nit: Seems like this could be private, but so little in this class is private
anyway that it may not be worthwhile.

[Dan Ehrenberg, 2016/05/27 18:21:54]

Done

+      const v8::FunctionCallbackInfo<v8::Value>& args);
+
   static void RealmCurrent(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void RealmOwner(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void RealmGlobal(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void RealmCreate(const v8::FunctionCallbackInfo<v8::Value>& args);
+  static void RealmCreateAllowCrossRealmAccess(
+      const v8::FunctionCallbackInfo<v8::Value>& args);
   static void RealmDispose(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void RealmSwitch(const v8::FunctionCallbackInfo<v8::Value>& args);
   static void RealmEval(const v8::FunctionCallbackInfo<v8::Value>& args);