add polymer calculator pageset

tools/perf/page_sets/data/polymer.json

Index: tools/perf/page_sets/data/polymer.json
diff --git a/tools/perf/page_sets/data/calendar_forward_backward.json b/tools/perf/page_sets/data/polymer.json
similarity index 61%
copy from tools/perf/page_sets/data/calendar_forward_backward.json
copy to tools/perf/page_sets/data/polymer.json
index f4caeae6d9252d373b55bd913cc7fccd314b77f2..5cf0feb1b2929b05db00ab6f2640aaa430748187 100644
--- a/tools/perf/page_sets/data/calendar_forward_backward.json
+++ b/tools/perf/page_sets/data/polymer.json
@@ -1,8 +1,8 @@
 {
     "description": "Describes the Web Page Replay archives for a page set. Don't edit by hand! Use record_wpr for updating.", 
     "archives": {
-        "calendar_forward_backward_000.wpr": [
-            "https://www.google.com/calendar/"
+        "polymer_000.wpr": [
+            "http://localhost:8000/components/paper-calculator/demo.html"
         ]
     }
-}
+}