Make browser tests all run from a server instead of the local filesystem.

samples/swarm/SwarmApp.dart

Index: samples/swarm/SwarmApp.dart
diff --git a/samples/swarm/SwarmApp.dart b/samples/swarm/SwarmApp.dart
index 462dcd30572f275598f2606665abc1458e343606..76c53a63e24f70c623b56ff0958c375146a47f73 100644
--- a/samples/swarm/SwarmApp.dart
+++ b/samples/swarm/SwarmApp.dart
@@ -23,8 +23,8 @@ class Swarm extends App {
   /** Observable UI state. */
   SwarmState state;
 
-  Swarm() : super(), onLoadFired = false {
-    Sections.initializeFromUrl((currSections) {
+  Swarm([bool useCannedData = false]) : super(), onLoadFired = false {

[Emily Fortuna, 2013/01/10 02:07:10]

I unfortunately had to add this hack because the way the data was being
transferred over the server on appengine was doing some fancy encoding thing
that my dumb dart server didn't know how to do. (see
samples/swarm/appengine/emitter.py)

[Jennifer Messerly, 2013/01/10 02:18:10]

yeah that's totally cool. The old code was dumb and assumed any server meant it
was running from its own real server :)

+    Sections.initializeFromUrl(useCannedData, (currSections) {
       sections = currSections;
       state = new SwarmState(sections);
       setupApp();