Don't make use of the 'id' property when sending objects.

Fixes #43.

browser/atom/objects-registry.coffee

@@ -1,11 +1,12 @@
 BrowserWindow = require 'browser-window'
 IDWeakMap = require 'id-weak-map'
+v8Util = process.atomBinding 'v8_util'
 
 class ObjectsStore
   @stores = {}
 
   constructor: ->
-    @nextId = 0
+    @nextId = 1
     @objects = []
 
   getNextId: ->
@@ -41,8 +42,7 @@ class ObjectsStore
 objectsWeakMap = new IDWeakMap
 objectsWeakMap.add = (obj) ->
   id = IDWeakMap::add.call this, obj
-  Object.defineProperty obj, 'id',
-    enumerable: true, writable: false, value: id
+  v8Util.setHiddenValue obj, 'atomId', id
   id
 
 windowsWeakMap = new IDWeakMap
@@ -63,13 +63,16 @@ process.on 'ATOM_BROWSER_INTERNAL_NEW', (obj) ->
 exports.add = (processId, routingId, obj) ->
   # Some native objects may already been added to objectsWeakMap, be care not
   # to add it twice.
-  objectsWeakMap.add obj unless obj.id? and objectsWeakMap.has obj.id
+  objectsWeakMap.add obj unless v8Util.getHiddenValue obj, 'atomId'
+  id = v8Util.getHiddenValue obj, 'atomId'
 
   # Store and reference the object, then return the storeId which points to
   # where the object is stored. The caller can later dereference the object
   # with the storeId.
   store = ObjectsStore.forRenderView processId, routingId
-  store.add obj
+  storeId = store.add obj
+
+  [id, storeId]
 
 exports.get = (id) ->
   objectsWeakMap.get id

browser/atom/rpc-server.coffee

@@ -22,8 +22,7 @@ valueToMeta = (processId, routingId, value) ->
     # Reference the original value if it's an object, because when it's
     # passed to renderer we would assume the renderer keeps a reference of
     # it.
-    meta.storeId = objectsRegistry.add processId, routingId, value
-    meta.id = value.id
+    [meta.id, meta.storeId] = objectsRegistry.add processId, routingId, value
 
     meta.members = []
     meta.members.push {name: prop, type: typeof field} for prop, field of value

renderer/api/lib/remote.coffee

@@ -8,8 +8,8 @@ callbacksRegistry = new CallbacksRegistry
 # Convert the arguments object into an array of meta data.
 wrapArgs = (args) ->
   Array::slice.call(args).map (value) ->
-    if value? and typeof value is 'object' and v8Util.getHiddenValue value, 'isRemoteObject'
-      type: 'object', id: value.id
+    if value? and typeof value is 'object' and v8Util.getHiddenValue value, 'atomId'
+      type: 'object', id: v8Util.getHiddenValue value, 'atomId'
     else if typeof value is 'function'
       type: 'function', id: callbacksRegistry.add(value)
     else
@@ -68,8 +68,8 @@ metaToValue = (meta) ->
         return unless currentContextExist
         ipc.sendChannel 'ATOM_BROWSER_DEREFERENCE', meta.storeId
 
-      # Mark this is a remote object.
-      v8Util.setHiddenValue ret, 'isRemoteObject', true
+      # Remember object's id.
+      v8Util.setHiddenValue ret, 'atomId', meta.id
 
       ret