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

tools/perf/page_sets/data/blink_memory_mobile.json

Index: tools/perf/page_sets/data/blink_memory_mobile.json
diff --git a/tools/perf/page_sets/data/blink_memory_mobile.json b/tools/perf/page_sets/data/blink_memory_mobile.json
index 95cd659811a49dd9b7c6ac0856d16216a508e589..55e5d262af421b3af953f20e9d69267dac2b52ed 100644
--- a/tools/perf/page_sets/data/blink_memory_mobile.json
+++ b/tools/perf/page_sets/data/blink_memory_mobile.json
@@ -1,19 +1,36 @@
 {
     "archives": {
-        "blink_memory_mobile_000.wpr": [
-            "Wordpress",
-            "Blogger",
-            "Worldjournal",
-            "Gmail",
-            "Pinterest",
-            "https://facebook.com/barackobama",
-            "Wikipedia (1 tab) - delayed scroll start",
-            "Reddit",
-            "GooglePlus"
-        ],
-        "blink_memory_mobile_003.wpr": [
-            "TheVerge"
-        ]
+        "Blogger": {
+            "DEFAULT": "blink_memory_mobile_000.wpr"
+        },
+        "Gmail": {
+            "DEFAULT": "blink_memory_mobile_000.wpr"
+        },
+        "GooglePlus": {
+            "DEFAULT": "blink_memory_mobile_000.wpr"
+        },
+        "Pinterest": {
+            "DEFAULT": "blink_memory_mobile_000.wpr"
+        },
+        "Reddit": {
+            "DEFAULT": "blink_memory_mobile_000.wpr"
+        },
+        "TheVerge": {
+            "DEFAULT": "blink_memory_mobile_003.wpr"
+        },
+        "Wikipedia (1 tab) - delayed scroll start": {
+            "DEFAULT": "blink_memory_mobile_000.wpr"
+        },
+        "Wordpress": {
+            "DEFAULT": "blink_memory_mobile_000.wpr"
+        },
+        "Worldjournal": {
+            "DEFAULT": "blink_memory_mobile_000.wpr"
+        },
+        "https://facebook.com/barackobama": {
+            "DEFAULT": "blink_memory_mobile_000.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
 }