Add robohornet as an animation test

tools/perf/page_sets/top_25.json

Index: tools/perf/page_sets/top_25.json
diff --git a/tools/perf/page_sets/top_25.json b/tools/perf/page_sets/top_25.json
index 61a40861c1733d4942eea4e3403684480e433141..f16c3b0cb462e73aaa9e9ce2e793c252119379f5 100644
--- a/tools/perf/page_sets/top_25.json
+++ b/tools/perf/page_sets/top_25.json
@@ -7,7 +7,7 @@
         {
             "url": "https://www.google.com/#hl=en&q=barack+obama",
             "why": "top google property; a google tab is often open",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             },
             "wait_for_element_with_text": "Next",
@@ -85,7 +85,7 @@
             "why": "productivity, top google properties",
             "credentials": "google",
             "wait_for_javascript_expression": "window.gmonkey !== undefined && document.getElementById('gb') !== null",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction",
                 "scrollable_element_function": "function(callback) { gmonkey.load('2.0', function(api) { callback(api.getScrollableElement()); }); }"
             },
@@ -110,7 +110,7 @@
             "why": "productivity, top google properties",
             "credentials": "google",
             "wait_for_element_with_selector": "div[class~=\"navForward\"]",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction",
                 "scrollable_element_function": "function(callback) { callback(document.getElementById('scrolltimedeventswk')); }"
             },
@@ -173,7 +173,7 @@
             "why": "productivity, top google properties",
             "credentials": "google",
             "wait_for_javascript_expression": "document.getElementsByClassName('doclistview-list').length",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction",
                 "scrollable_element_function": "function(callback) { callback(document.getElementsByClassName('doclistview-list')[0]); }"
             }
@@ -184,7 +184,7 @@
             "why": "productivity, top google properties; Sample doc in the link",
             "credentials": "google",
             "wait_for_javascript_expression": "document.getElementsByClassName('kix-appview-editor').length",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction",
                 "scrollable_element_function": "function(callback) { callback(document.getElementsByClassName('kix-appview-editor')[0]); }"
             }
@@ -194,7 +194,7 @@
             "why": "social; top google property; Public profile; infinite scrolls",
             "credentials": "google",
             "wait_for_element_with_text": "Home",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction",
                 "scroll_is_infinite": true
             },
@@ -238,7 +238,7 @@
             "url": "http://www.youtube.com",
             "why": "#3 (Alexa global)",
             "credentials": "google",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             }
         },
@@ -247,7 +247,7 @@
             "url": "http://googlewebmastercentral.blogspot.com/",
             "why": "#11 (Alexa global), google property; some blogger layouts have infinite scroll but more interesting",
             "wait_for_element_with_text": "accessibility",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             },
             "stress_memory": {
@@ -294,7 +294,7 @@
             "url": "http://en.blog.wordpress.com/2012/09/04/freshly-pressed-editors-picks-for-august-2012/",
             "why": "#18 (Alexa global), Picked an interesting post",
             "wait_for_element_with_selector": "a[href=\"http://en.blog.wordpress.com/2012/08/30/new-themes-able-and-sight/\"]",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             },
             "stress_memory": {
@@ -339,7 +339,7 @@
             "why": "top social,Public profile",
             "credentials": "facebook",
             "wait_for_element_with_text": "About",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction",
                 "scroll_is_infinite": true
             },
@@ -389,7 +389,7 @@
             "name": "LinkedIn",
             "url": "http://www.linkedin.com/in/linustorvalds",
             "why": "#12 (Alexa global),Public profile",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             }
         },
@@ -397,7 +397,7 @@
             "name": "Wikipedia (1 tab)",
             "url": "http://en.wikipedia.org/wiki/Wikipedia",
             "why": "#6 (Alexa) most visited worldwide,Picked an interesting page",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             }
         },
@@ -405,7 +405,7 @@
             "name": "Twitter",
             "url": "http://twitter.com/katyperry",
             "why": "#8 (Alexa global),Picked an interesting page",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction",
                 "scroll_is_infinite": true
             }
@@ -414,7 +414,7 @@
             "name": "Pinterest",
             "url": "http://pinterest.com",
             "why": "#37 (Alexa global)",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction",
                 "scroll_is_infinite": true
             }
@@ -423,21 +423,21 @@
             "name": "ESPN",
             "url": "http://espn.go.com",
             "why": "#1 sports",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             }
         },
         {
             "url": "http://news.yahoo.com",
             "why": "#1 news worldwide (Alexa global)",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             }
         },
         {
             "url": "http://www.cnn.com",
             "why": "#2 news worldwide",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             }
         },
@@ -445,56 +445,56 @@
             "name": "Weather.com",
             "url": "http://www.weather.com/weather/right-now/Mountain+View+CA+94043",
             "why": "#7 (Alexa news); #27 total time spent,Picked interesting page",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             }
         },
         {
             "url": "http://www.amazon.com",
             "why": "#1 world commerce website by visits; #3 commerce in the US by time spent",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             }
         },
         {
             "url": "http://www.ebay.com",
             "why": "#1 commerce website by time spent by users in US",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             }
         },
         {
             "url": "http://games.yahoo.com",
             "why": "#1 games according to Alexa (with actual games in it)",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             }
         },
         {
             "url": "http://booking.com",
             "why": "#1 Alexa recreation",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             }
         },
         {
             "url": "http://answers.yahoo.com",
             "why": "#1 Alexa reference",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             }
         },
         {
             "url": "http://sports.yahoo.com/",
             "why": "#1 Alexa sports",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             }
         },
         {
             "url": "http://techcrunch.com",
             "why": "top tech blog",
-            "scrolling": {
+            "smoothness": {
                 "action": "scrolling_interaction"
             }
         }