Rename tools/perf/metrics/io.py to resolve naming conflicts.

tools/perf/metrics/io.py

-# Copyright 2013 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 metrics import Metric
-
-class IOMetric(Metric):
-  """IO-related metrics, obtained via telemetry.core.Browser."""
-
-  @classmethod
-  def CustomizeBrowserOptions(cls, options):
-    options.AppendExtraBrowserArgs('--no-sandbox')
-
-  def Start(self, page, tab):
-    raise NotImplementedError()
-
-  def Stop(self, page, tab):
-    raise NotImplementedError()
-
-  def AddResults(self, tab, results):
-    # This metric currently only returns summary results, not per-page results.
-    raise NotImplementedError()
-
-  def AddSummaryResults(self, browser, results):
-    """Add summary results to the results object."""
-    io_stats = browser.io_stats
-    if not io_stats['Browser']:
-      return
-
-    def AddSummariesForProcessType(process_type_io, process_type_trace):
-      """For a given process type, add all relevant summary results.
-
-      Args:
-        process_type_io: Type of process (eg Browser or Renderer).
-        process_type_trace: String to be added to the trace name in the results.
-      """
-      if 'ReadOperationCount' in io_stats[process_type_io]:
-        results.AddSummary('read_operations_' + process_type_trace, 'count',
-                           io_stats[process_type_io]
-                           ['ReadOperationCount'],
-                           data_type='unimportant')
-      if 'WriteOperationCount' in io_stats[process_type_io]:
-        results.AddSummary('write_operations_' + process_type_trace, 'count',
-                           io_stats[process_type_io]
-                           ['WriteOperationCount'],
-                           data_type='unimportant')
-      if 'ReadTransferCount' in io_stats[process_type_io]:
-        results.AddSummary('read_bytes_' + process_type_trace, 'kb',
-                           io_stats[process_type_io]
-                           ['ReadTransferCount'] / 1024,
-                           data_type='unimportant')
-      if 'WriteTransferCount' in io_stats[process_type_io]:
-        results.AddSummary('write_bytes_' + process_type_trace, 'kb',
-                           io_stats[process_type_io]
-                           ['WriteTransferCount'] / 1024,
-                           data_type='unimportant')
-
-    AddSummariesForProcessType('Browser', 'browser')
-    AddSummariesForProcessType('Renderer', 'renderer')
-    AddSummariesForProcessType('Gpu', 'gpu')
-