[tools/perf] Fix JavaScript interpolation in action_runner calls

tools/perf/page_sets/todomvc.py

Index: tools/perf/page_sets/todomvc.py
diff --git a/tools/perf/page_sets/todomvc.py b/tools/perf/page_sets/todomvc.py
index 35daccbd6fc847b23504e1983260c776852690d3..43ce61e4f349dc61f50c4e3c173ac1f06ecec710 100644
--- a/tools/perf/page_sets/todomvc.py
+++ b/tools/perf/page_sets/todomvc.py
@@ -5,6 +5,7 @@
 from telemetry.page import page as page_module
 from telemetry.page import shared_page_state
 from telemetry import story
+from telemetry.util import js_template
 
 
 URL_LIST = [
@@ -31,8 +32,8 @@ class TodoMVCPage(page_module.Page):
     # TODO(jochen): This interaction does not include the
     # WindowProxy::initialize portion before the commit. To fix this, we'll
     # have to migrate to TBMv2.
-    self.script_to_evaluate_on_commit = (
-        'console.time("%s");' % INTERACTION_NAME)
+    self.script_to_evaluate_on_commit = js_template.Render(
+        'console.time({{ label }});', label=INTERACTION_NAME)
 
   def RunPageInteractions(self, action_runner):
     action_runner.ExecuteJavaScript(
@@ -48,8 +49,8 @@ class TodoMVCPage(page_module.Page):
         """
     )
     action_runner.WaitForJavaScriptCondition('this.becameIdle === true')
-    # TODO(catapult:#3028): Fix interpolation of JavaScript values.
-    action_runner.ExecuteJavaScript('console.timeEnd("%s");' % INTERACTION_NAME)
+    action_runner.ExecuteJavaScript(
+        'console.timeEnd({{ label }});', label=INTERACTION_NAME)
 
 
 class TodoMVCPageSet(story.StorySet):