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

tools/perf/page_sets/data/tough_path_rendering_cases.json

 {
     "archives": {
-        "tough_path_rendering_cases_000.wpr": [
-            "http://ie.microsoft.com/testdrive/Performance/Chalkboard/"
-        ],
-        "tough_path_rendering_cases_001.wpr": [
-            "http://www.craftymind.com/factory/guimark2/HTML5ChartingTest.html"
-        ],
-        "tough_path_rendering_cases_002.wpr": [
-            "MotionMark Canvas Stroke Shapes",
-            "https://testdrive-archive.azurewebsites.net/performance/chalkboard/",
-            "GUIMark Vector Chart Test",
-            "MotionMark Canvas Fill Shapes"
-        ]
+        "GUIMark Vector Chart Test": {
+            "DEFAULT": "tough_path_rendering_cases_002.wpr"
+        },
+        "MotionMark Canvas Fill Shapes": {
+            "DEFAULT": "tough_path_rendering_cases_002.wpr"
+        },
+        "MotionMark Canvas Stroke Shapes": {
+            "DEFAULT": "tough_path_rendering_cases_002.wpr"
+        },
+        "http://ie.microsoft.com/testdrive/Performance/Chalkboard/": {
+            "DEFAULT": "tough_path_rendering_cases_000.wpr"
+        },
+        "http://www.craftymind.com/factory/guimark2/HTML5ChartingTest.html": {
+            "DEFAULT": "tough_path_rendering_cases_001.wpr"
+        },
+        "https://testdrive-archive.azurewebsites.net/performance/chalkboard/": {
+            "DEFAULT": "tough_path_rendering_cases_002.wpr"
+        }
     },
-    "description": "Describes the Web Page Replay archives for a story set. Don't edit by hand! Use record_wpr for updating."
+    "description": "Describes the Web Page Replay archives for a story set. Don't edit by hand! Use record_wpr for updating.",
+    "platform_specific": true
 }