[Storage] Blob Storage perf tests

tools/perf/benchmarks/blob_storage.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 import benchmark
+from telemetry.core.platform import tracing_category_filter
+from telemetry.web_perf import timeline_based_measurement
+
+import page_sets
+
+TOPLEVEL_CATEGORY = 'Blob'

[eakuefner, 2015/05/22 18:33:18]

I think you can group constant definitions together, but a newline above this
would be good. I view a group of constant definitions as sort of "one top-level
definition"

[dmurph, 2015/05/22 19:06:20]

Done.

+
+
+class BlobStorage(benchmark.Benchmark):
+  """Timeline based measurement benchmark for Blob Storage."""

[eakuefner, 2015/05/22 18:33:18]

nit: newline after

[dmurph, 2015/05/22 19:06:20]

Done.

+  page_set = page_sets.BlobWorkshopPageSet
+
+  def CreateTimelineBasedMeasurementOptions(self):
+    cat_filter = tracing_category_filter.CreateMinimalOverheadFilter()
+    cat_filter.AddIncludedCategory(TOPLEVEL_CATEGORY)
+    cat_filter.AddIncludedCategory('blink.console')
+
+    return timeline_based_measurement.Options(
+        overhead_level=cat_filter)
+
+  @classmethod
+  def Name(cls):
+    return 'blob_storage.blob_storage'
+
+  @classmethod
+  def ValueCanBeAddedPredicate(cls, value, is_first_result):
+    return (value.name.startswith('Action_CreateBlob') or
+            value.name.startswith('Action_ReadBlobs') or
+            'BlobCreateAndRead' in value.name)