telemetry: Allow page tests to be configured via constructor

tools/perf/measurements/rasterize_and_record_micro.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.
 
 import sys
 import time
 
 from telemetry.core.util import TimeoutException
 from telemetry.page import page_test
 from telemetry.value import scalar
 
 
 class RasterizeAndRecordMicro(page_test.PageTest):
   def __init__(self):
     super(RasterizeAndRecordMicro, self).__init__('')
     self._chrome_branch_number = None
 
-  @classmethod
-  def AddCommandLineArgs(cls, parser):
+  def AddCommandLineArgs(self, parser):
     parser.add_option('--start-wait-time', type='float',
                       default=2,
                       help='Wait time before the benchmark is started '
                       '(must be long enought to load all content)')
     parser.add_option('--rasterize-repeat', type='int',
                       default=100,
                       help='Repeat each raster this many times. Increase '
                       'this value to reduce variance.')
     parser.add_option('--record-repeat', type='int',
                       default=100,
@@ skipping 109 matching lines @@
           results.current_page, 'total_layers', 'count', total_layers))
       results.AddValue(scalar.ScalarValue(
           results.current_page, 'total_picture_layers', 'count',
           total_picture_layers))
       results.AddValue(scalar.ScalarValue(
           results.current_page, 'total_picture_layers_with_no_content', 'count',
           total_picture_layers_with_no_content))
       results.AddValue(scalar.ScalarValue(
           results.current_page, 'total_picture_layers_off_screen', 'count',
           total_picture_layers_off_screen))