Hook up more import/exports in natives.

src/object-observe.js

Index: src/object-observe.js
diff --git a/src/object-observe.js b/src/object-observe.js
index c90c6c7af1d058387ed6482be045009c4587a25a..219d7b72d521c3b2b9cbde526c04ce06294dd829 100644
--- a/src/object-observe.js
+++ b/src/object-observe.js
@@ -23,6 +23,14 @@ var GlobalArray = global.Array;
 var GlobalObject = global.Object;
 var InternalArray = utils.InternalArray;
 
+var ObjectFreeze;
+var ObjectIsFrozen;
+
+utils.Import(function(from) {
+  ObjectFreeze = from.ObjectFreeze;
+  ObjectIsFrozen = from.ObjectIsFrozen;
+});
+
 // -------------------------------------------------------------------
 
 // Overview:
@@ -380,7 +388,7 @@ function ObjectObserve(object, callback, acceptList) {
     throw MakeTypeError(kObserveGlobalProxy, "observe");
   if (!IS_SPEC_FUNCTION(callback))
     throw MakeTypeError(kObserveNonFunction, "observe");
-  if ($objectIsFrozen(callback))
+  if (ObjectIsFrozen(callback))
     throw MakeTypeError(kObserveCallbackFrozen);
 
   var objectObserveFn = %GetObjectContextObjectObserve(object);
@@ -473,7 +481,7 @@ function ObjectInfoEnqueueExternalChangeRecord(objectInfo, changeRecord, type) {
     %DefineDataPropertyUnchecked(
         newRecord, prop, changeRecord[prop], READ_ONLY + DONT_DELETE);
   }
-  $objectFreeze(newRecord);
+  ObjectFreeze(newRecord);
 
   ObjectInfoEnqueueInternalChangeRecord(objectInfo, newRecord);
 }
@@ -525,8 +533,8 @@ function EnqueueSpliceRecord(array, index, removed, addedCount) {
     addedCount: addedCount
   };
 
-  $objectFreeze(changeRecord);
-  $objectFreeze(changeRecord.removed);
+  ObjectFreeze(changeRecord);
+  ObjectFreeze(changeRecord.removed);
   ObjectInfoEnqueueInternalChangeRecord(objectInfo, changeRecord);
 }
 
@@ -550,7 +558,7 @@ function NotifyChange(type, object, name, oldValue) {
     };
   }
 
-  $objectFreeze(changeRecord);
+  ObjectFreeze(changeRecord);
   ObjectInfoEnqueueInternalChangeRecord(objectInfo, changeRecord);
 }
 
@@ -607,7 +615,7 @@ function ObjectGetNotifier(object) {
   if (%IsJSGlobalProxy(object))
     throw MakeTypeError(kObserveGlobalProxy, "getNotifier");
 
-  if ($objectIsFrozen(object)) return null;
+  if (ObjectIsFrozen(object)) return null;
 
   if (!%ObjectWasCreatedInCurrentOrigin(object)) return null;
 
@@ -665,17 +673,17 @@ function ObserveMicrotaskRunner() {
 
 // -------------------------------------------------------------------
 
-$installFunctions(GlobalObject, DONT_ENUM, [
+utils.InstallFunctions(GlobalObject, DONT_ENUM, [
   "deliverChangeRecords", ObjectDeliverChangeRecords,
   "getNotifier", ObjectGetNotifier,
   "observe", ObjectObserve,
   "unobserve", ObjectUnobserve
 ]);
-$installFunctions(GlobalArray, DONT_ENUM, [
+utils.InstallFunctions(GlobalArray, DONT_ENUM, [
   "observe", ArrayObserve,
   "unobserve", ArrayUnobserve
 ]);
-$installFunctions(notifierPrototype, DONT_ENUM, [
+utils.InstallFunctions(notifierPrototype, DONT_ENUM, [
   "notify", ObjectNotifierNotify,
   "performChange", ObjectNotifierPerformChange
 ]);