Rename animations pageset to tough_animation_cases

tools/perf/page_sets/animations.json

Index: tools/perf/page_sets/animations.json
diff --git a/tools/perf/page_sets/animations.json b/tools/perf/page_sets/animations.json
deleted file mode 100644
index d9e0e3e970406b7480a39c1502c4112c378286e9..0000000000000000000000000000000000000000
--- a/tools/perf/page_sets/animations.json
+++ /dev/null
@@ -1,29 +0,0 @@
-{
-  "description": "A collection of animation performance tests",
-  "pages": [
-    {
-      "url": "file:///animations/keyframed_animations.html",
-      "why": "Tests various keyframed animations.",
-      "smoothness": {
-        "action": "wait_interaction",
-        "duration": 5
-      }
-    },
-    {
-      "url": "file:///animations/transform_transitions.html",
-      "why": "Tests various transitions.",
-      "smoothness": {
-        "action": "wait_interaction",
-        "duration": 5
-      }
-    },
-    {
-      "url": "http://ie.microsoft.com/testdrive/performance/robohornetpro/",
-      "why": "Login page is slow because of ineffecient transform operations",
-      "smoothness": {
-        "action": "wait_interaction",
-        "duration": 5
-      }
-    }
-  ]
-}