[core] use stale styles

This adds support for using cached styles that are stale. They're treated like changing styles; when the refreshed style changed compared to the one we've already had, we're swapping out the entire style, which might cause a slight flicker.

1 files changed, 3 insertions, 0 deletions

diff --git a/test/storage/server.js b/test/storage/server.js
index 5d547b1506..0024330037 100755
--- a/test/storage/server.js
+++ b/test/storage/server.js
@@ -32,6 +32,9 @@ app.get('/test', function (req, res) {
     res.send('Hello World!');
 });
 
+app.get('/stale/*', function() {
+    // Never respond.
+});
 
 var cacheCounter = 0;
 app.get('/cache', function(req, res) {