[tools/perf] Fix JavaScript interpolation in action_runner calls

tools/perf/page_sets/blob_workshop.py

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 from telemetry.page import page as page_module
 from telemetry.page import legacy_page_test
 from telemetry import story
 
 
 NUM_BLOB_MASS_CREATE_READS = 15
 
 
 class BlobCreateThenRead(page_module.Page):
 
   def __init__(self, write_method, blob_sizes, page_set):
     super(BlobCreateThenRead, self).__init__(
       url='file://blob/blob-workshop.html',
       page_set=page_set,
       name='blob-create-read-' + write_method)
     self._blob_sizes = blob_sizes
 
   def RunPageInteractions(self, action_runner):
     action_runner.ExecuteJavaScript('disableUI = true;')
 
     for size_bytes in self._blob_sizes:
       with action_runner.CreateInteraction('Action_CreateAndReadBlob',
                                            repeatable=True):
-        # TODO(catapult:#3028): Fix interpolation of JavaScript values.
         action_runner.ExecuteJavaScript(
-            'createAndRead(' + str(size_bytes) + ');')
+            'createAndRead({{ size }});', size=size_bytes)
         action_runner.WaitForJavaScriptCondition(
             'doneReading === true || errors', timeout_in_seconds=60)
 
     errors = action_runner.EvaluateJavaScript('errors')
     if errors:
       raise legacy_page_test.Failure('Errors on page: ' + ', '.join(errors))
 
 
 class BlobMassCreate(page_module.Page):
   def __init__(self, write_method, blob_sizes, page_set):
     super(BlobMassCreate, self).__init__(
       url='file://blob/blob-workshop.html',
       page_set=page_set,
       name='blob-mass-create-' + write_method)
     self._blob_sizes = blob_sizes
 
   def RunPageInteractions(self, action_runner):
     action_runner.ExecuteJavaScript('disableUI = true;')
 
     # Add blobs
     for size_bytes in self._blob_sizes:
       with action_runner.CreateInteraction('Action_CreateBlob',
                                            repeatable=True):
-        # TODO(catapult:#3028): Fix interpolation of JavaScript values.
-        action_runner.ExecuteJavaScript('createBlob(' + str(size_bytes) + ');')
+        action_runner.ExecuteJavaScript(
+            'createBlob({{ size }});', size=size_bytes)
 
     # Read blobs
     for _ in range(0, NUM_BLOB_MASS_CREATE_READS):
       with action_runner.CreateInteraction('Action_ReadBlobs',
                                            repeatable=True):
         action_runner.ExecuteJavaScript('readBlobsSerially();')
         action_runner.WaitForJavaScriptCondition(
             'doneReading === true || errors', timeout_in_seconds=60)
     # Clean up blobs. Make sure this flag is turned on:
     # --enable-experimental-web-platform-features
@@ skipping 25 matching lines @@
 
     self.AddStory(BlobCreateThenRead('2Bx200', [2] * 200, self))
     self.AddStory(BlobCreateThenRead('1KBx200', [1024] * 200, self))
     self.AddStory(
         BlobCreateThenRead('150KBx200', [150 * 1024 - 1] * 200, self))
     self.AddStory(BlobCreateThenRead('1MBx200', [1024 * 1024] * 200, self))
     self.AddStory(
         BlobCreateThenRead('10MBx30', [10 * 1024 * 1024] * 30, self))
     self.AddStory(
         BlobCreateThenRead('80MBx5', [80 * 1024 * 1024] * 5, self))