Adding page cycler benchmark on the key mobile sites archive.

tools/perf/test-info.json

Index: tools/perf/test-info.json
diff --git a/tools/perf/test-info.json b/tools/perf/test-info.json
index 87a0f90e8d2aeb0e7bb0964c38c78607b62327f5..4f77e32e04e37a0353cb58ae252b42b2e9ab4fe1 100644
--- a/tools/perf/test-info.json
+++ b/tools/perf/test-info.json
@@ -165,6 +165,9 @@
   "page_cycler.top_10_mobile":{
     "description":"Page load time benchmark for the top 10 mobile web pages. Runs against pages recorded in November, 2013."
   },
+  "page_cycler.key_mobile_sites":{
+    "description":"Page load time benchmark for key mobile sites."
+  },
   "page_cycler.tough_layout_cases":{
     "description":"Page loading benchmark for the slowest layouts observed in the Alexa top 1 million sites in July 2013."
   },