[Storage] Blob Storage perf tests

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 page_test as page_test
+from telemetry.page import page_set as page_set_module
+
+class BlobWorkshopPage(page_module.Page):
+  def __init__(self, blob_sizes, read_method, page_set):
+    super(BlobWorkshopPage, self).__init__(url='file://blob/blob-workshop.html', page_set=page_set)
+    self.blob_sizes = blob_sizes
+    self.read_method = read_method
+    self.errors = []
+
+  def RunNavigateSteps(self, action_runner):
+    url = self.file_path_url_with_scheme if self.is_file else self.url
+    action_runner.Navigate(
+        url, script_to_evaluate_on_commit=self.script_to_evaluate_on_commit)
+
+    # Add blobs
+    for size_bytes in self.blob_sizes:
+      with action_runner.CreateInteraction('Action_CreateBlob',
+                                           repeatable=True):
+        action_runner.ExecuteJavaScript('createBlob(' + str(size_bytes) + ');')
+
+    # Read blobs
+    with action_runner.CreateInteraction('Action_ReadBlob'):
+      if self.read_method is 'serial':
+        action_runner.ExecuteJavaScript('readBlobsSerially();')
+      else:
+        action_runner.ExecuteJavaScript('readBlobsInParallel();')
+      action_runner.WaitForJavaScriptCondition('doneReading == true', 60)
+
+    self.errors = action_runner.EvaluateJavaScript('errors')
+    if (self.errors):
+      raise page_test.Failure('Errors on page: ' + ', '.join(self.errors))
+
+class BlobWorkshopPageSet(page_set_module.PageSet):
+  """The BlobWorkshop page."""
+
+  def __init__(self):
+    super(BlobWorkshopPageSet, self).__init__()
+    self.AddUserStory(BlobWorkshopPage([2] * 100, 'serial', self))
+    # self.AddUserStory(BlobWorkshopPage([2] * 10000, 'parallel', self))
+    # self.AddUserStory(BlobWorkshopPage([10] * 10000, 'parallel', self))
+    # self.AddUserStory(BlobWorkshopPage([1024] * 1000, 'parallel', self))
+    # self.AddUserStory(BlobWorkshopPage([10 * 1024] * 10, 'parallel', self))
+    # self.AddUserStory(BlobWorkshopPage([100 * 1024] * 2, 'parallel', self))
+    # self.AddUserStory(BlobWorkshopPage([501 * 1024], 'serial', self))