Revert of telemetry: Remove command line args from page test

tools/perf/measurements/record_per_area.py

Index: tools/perf/measurements/record_per_area.py
diff --git a/tools/perf/measurements/record_per_area.py b/tools/perf/measurements/record_per_area.py
index cb89e1133f14855eebb079265de84798664036c8..0804addd1e91476204405d29c3cc8af4603dbee3 100644
--- a/tools/perf/measurements/record_per_area.py
+++ b/tools/perf/measurements/record_per_area.py
@@ -10,9 +10,14 @@
 
 
 class RecordPerArea(page_test.PageTest):
-  def __init__(self, start_wait_time=2):
+  def __init__(self):
     super(RecordPerArea, self).__init__('', True)
-    self._start_wait_time = start_wait_time
+
+  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)')
 
   def CustomizeBrowserOptions(self, options):
     smoothness.Smoothness.CustomizeBrowserOptions(options)
@@ -25,7 +30,7 @@
   def ValidateAndMeasurePage(self, page, tab, results):
     # Wait until the page has loaded and come to a somewhat steady state.
     # Needs to be adjusted for every device (~2 seconds for workstation).
-    time.sleep(self._start_wait_time)
+    time.sleep(self.options.start_wait_time)
 
     # Enqueue benchmark
     tab.ExecuteJavaScript("""