Don't use kFSEventStreamCreateFlagNoDefer as it messes with event flushing.

BUG=
R=sgjesse@google.com

Review URL: https://codereview.chromium.org//321133002

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@37171 260f80e4-7a28-3924-810f-c04153c831b5

pkg/watcher/pubspec.yaml

@@ -12,4 +12,4 @@ dev_dependencies:
   scheduled_test: ">=0.9.3-dev <0.11.0"
   unittest: ">=0.9.2 <0.10.0"
 environment:
-  sdk: ">=1.3.0 <2.0.0"
+  sdk: ">=1.6.0 <2.0.0"

runtime/bin/file_system_watcher_macos.cc

@@ -113,7 +113,7 @@ class FSEventsWatcher {
           array,
           kFSEventStreamEventIdSinceNow,
           0.10,
-          kFSEventStreamCreateFlagNoDefer | kFSEventStreamCreateFlagFileEvents);
+          kFSEventStreamCreateFlagFileEvents);
       CFRelease(array);
 
       node->set_ref(ref);