Add performance tests for Map/Set with String and Object keys

test/js-perf-test/Collections/Collections.json

Index: test/js-perf-test/Collections/Collections.json
diff --git a/test/js-perf-test/Collections/Collections.json b/test/js-perf-test/Collections/Collections.json
index 63c3aa5b149839d4d589c7fec7dd1bb49479b7e9..fd29f462ef6c64e35894caa96351c59e5d70afc8 100644
--- a/test/js-perf-test/Collections/Collections.json
+++ b/test/js-perf-test/Collections/Collections.json
@@ -2,14 +2,19 @@
   "name": "JSTests/Collections",
   "path": ["."],
   "main": "run.js",
-  "flags": ["--harmony-collections"],
   "run_count": 5,
   "units": "score",
   "results_regexp": "^%s\\-Collections\\(Score\\): (.+)$",
   "total": true,
   "tests": [
-    {"name": "Map"},
-    {"name": "Set"},
+    {"name": "Map-Smi"},
+    {"name": "Map-String"},
+    {"name": "Map-Object"},
+    {"name": "Map-Iteration"},
+    {"name": "Set-Smi"},
+    {"name": "Set-String"},
+    {"name": "Set-Object"},
+    {"name": "Set-Iteration"},
     {"name": "WeakMap"},
     {"name": "WeakSet"}
   ]