Remove memory metrics from WebRTC measurements.

tools/perf/measurements/webrtc.py

Index: tools/perf/measurements/webrtc.py
diff --git a/tools/perf/measurements/webrtc.py b/tools/perf/measurements/webrtc.py
index 9735e4aa7c21124ea9fc74ee4d24d246c3b1bf0f..90061f8ea7e1a162c50556c3bd6cb591931affc6 100644
--- a/tools/perf/measurements/webrtc.py
+++ b/tools/perf/measurements/webrtc.py
@@ -6,7 +6,6 @@ from telemetry.page import legacy_page_test
 
 from metrics import cpu
 from metrics import media
-from metrics import memory
 from metrics import power
 from metrics import webrtc_stats
 
@@ -18,7 +17,6 @@ class WebRTC(legacy_page_test.LegacyPageTest):
     super(WebRTC, self).__init__()
     self._cpu_metric = None
     self._media_metric = None
-    self._memory_metric = None
     self._power_metric = None
     self._webrtc_stats_metric = None
 
@@ -27,19 +25,16 @@ class WebRTC(legacy_page_test.LegacyPageTest):
 
   def DidStartBrowser(self, browser):
     self._cpu_metric = cpu.CpuMetric(browser)
-    self._memory_metric = memory.MemoryMetric(browser)
     self._webrtc_stats_metric = webrtc_stats.WebRtcStatisticsMetric()
 
   def DidNavigateToPage(self, page, tab):
     self._cpu_metric.Start(page, tab)
     self._media_metric = media.MediaMetric(tab)
     self._media_metric.Start(page, tab)
-    self._memory_metric.Start(page, tab)
     self._power_metric.Start(page, tab)
     self._webrtc_stats_metric.Start(page, tab)
 
   def CustomizeBrowserOptions(self, options):
-    memory.MemoryMetric.CustomizeBrowserOptions(options)
     options.AppendExtraBrowserArgs('--use-fake-device-for-media-stream')
     options.AppendExtraBrowserArgs('--use-fake-ui-for-media-stream')
     power.PowerMetric.CustomizeBrowserOptions(options)
@@ -55,9 +50,6 @@ class WebRTC(legacy_page_test.LegacyPageTest):
     self._media_metric.Stop(page, tab)
     self._media_metric.AddResults(tab, results, exclude_metrics=exclude_metrics)
 
-    self._memory_metric.Stop(page, tab)
-    self._memory_metric.AddResults(tab, results)
-
     self._power_metric.Stop(page, tab)
     self._power_metric.AddResults(tab, results)