Store Object.observe state per-isolate rather than per-context

src/object-observe.js

Index: src/object-observe.js
diff --git a/src/object-observe.js b/src/object-observe.js
index dcf98d84aed1e66359b2c71d8f648733f7479922..13cf335957fd1138698f01b659819b6d0ba45e7c 100644
--- a/src/object-observe.js
+++ b/src/object-observe.js
@@ -43,8 +43,13 @@ function createInternalWeakMap() {
   return map;
 }
 
-var observerInfoMap = createInternalWeakMap();
-var objectInfoMap = createInternalWeakMap();
+var objectObservationState = %GetObjectObservationState();
+if (IS_UNDEFINED(objectObservationState.observerInfoMap)) {
+  objectObservationState.observerInfoMap = createInternalWeakMap();

[Michael Starzinger, 2012/11/05 13:08:10]

This will make the WeakMap instantiated in this context globally reachable from
the whole isolate. Thereby the first context will be kept alive indefinitely.

+  objectObservationState.objectInfoMap = createInternalWeakMap();
+}
+var observerInfoMap = objectObservationState.observerInfoMap;
+var objectInfoMap = objectObservationState.objectInfoMap;
 
 function ObjectObserve(object, callback) {
   if (!IS_SPEC_OBJECT(object))
@@ -161,4 +166,4 @@ function SetupObjectObserve() {
   ));
 }
 
-SetupObjectObserve();
+SetupObjectObserve();