[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.
+# 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 core import perf_benchmark
+
+from telemetry.core.platform import tracing_category_filter
+from telemetry.web_perf import timeline_based_measurement
+
+import page_sets
+
+
+BLOB_CATEGORY = 'Blob'
+TIMELINE_REQUIRED_CATEGORY = 'blink.console'
+
+
+class BlobStorage(perf_benchmark.PerfBenchmark):
+  """Timeline based measurement benchmark for Blob Storage."""
+
+  page_set = page_sets.BlobWorkshopPageSet
+
+  def CreateTimelineBasedMeasurementOptions(self):
+    cat_filter = tracing_category_filter.CreateMinimalOverheadFilter()
+    cat_filter.AddIncludedCategory(BLOB_CATEGORY)
+    cat_filter.AddIncludedCategory(TIMELINE_REQUIRED_CATEGORY)
+
+    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):
+    if ('blob-writes' not in value.name and
+        'blob-reads' not in value.name):
+      return False
+    return value.values != None