- Move timer implementation closer to the rest of message handling.

runtime/bin/common_patch.dart

Index: runtime/bin/common_patch.dart
===================================================================
--- runtime/bin/common_patch.dart	(revision 43127)
+++ runtime/bin/common_patch.dart	(working copy)
@@ -7,10 +7,6 @@
       native "Crypto_GetRandomBytes";
 }
 
-
-// Provide a closure which will allocate a Timer object to be able to hook
-// up the Timer interface in dart:isolate with the implementation here.
-_getTimerFactoryClosure() {
-  runTimerClosure = _Timer._handleTimeout;
-  return _Timer._factory;
-}
+_setupHooks() {
+  VMLibraryHooks.eventHandlerSendData = _EventHandler._sendData;
+}