[Telemetry] Update all WPR json files to the new format.

tools/perf/page_sets/data/tough_animation_cases.json

Index: tools/perf/page_sets/data/tough_animation_cases.json
diff --git a/tools/perf/page_sets/data/tough_animation_cases.json b/tools/perf/page_sets/data/tough_animation_cases.json
index be6b9ebccf4dd730ea96f97c66209db92dc4fa31..6800be70438a287849ae7f7b8cd42590c833e029 100644
--- a/tools/perf/page_sets/data/tough_animation_cases.json
+++ b/tools/perf/page_sets/data/tough_animation_cases.json
@@ -1,8 +1,9 @@
 {
-    "description": "Describes the Web Page Replay archives for a page set. Don't edit by hand! Use record_wpr for updating.", 
     "archives": {
-        "tough_animation_cases_000.wpr": [
-            "http://ie.microsoft.com/testdrive/performance/robohornetpro/"
-        ]
-    }
+        "http://ie.microsoft.com/testdrive/performance/robohornetpro/": {
+            "DEFAULT": "tough_animation_cases_000.wpr"
+        }
+    },
+    "description": "Describes the Web Page Replay archives for a story set. Don't edit by hand! Use record_wpr for updating.",
+    "platform_specific": true
 }