Cleanup interaction creation and add ExecuteJavaScript to action_runner.py

tools/perf/page_sets/calendar_forward_backward.py

Index: tools/perf/page_sets/calendar_forward_backward.py
diff --git a/tools/perf/page_sets/calendar_forward_backward.py b/tools/perf/page_sets/calendar_forward_backward.py
index 0e369a3b8674c13d4e245745231b658b4a3dfcbd..f4ca483ef41e3f2a0499d1a2fbfcac4b62e07ead 100644
--- a/tools/perf/page_sets/calendar_forward_backward.py
+++ b/tools/perf/page_sets/calendar_forward_backward.py
@@ -32,16 +32,13 @@ class CalendarForwardBackwardPage(page_module.Page):
         'condition': 'element',
         'selector': 'div[class~="navForward"]'
       }))
-    action_runner.RunAction(JavascriptAction(
-      {
-        'expression': '''
-          (function() {
-            var elem = document.createElement('meta');
-            elem.name='viewport';
-            elem.content='initial-scale=1';
-            document.body.appendChild(elem);
-          })();'''
-      }))
+    action_runner.ExecuteJavaScript('''
+        (function() {
+          var elem = document.createElement('meta');
+          elem.name='viewport';
+          elem.content='initial-scale=1';
+          document.body.appendChild(elem);
+        })();''')
 
   def RunEndure(self, action_runner):
     action_runner.RunAction(ClickElementAction(