[tools/perf] Set performance mode based on options in startup.mobile

The Telemetry platform interface has changed recently to allow more user
control over performance mode. This CL switches the startup.mobile
benchmark to the new interface.

Bug: chromium:1096589
Change-Id: I38b6627a8620f8822fe2c7cab2b9e7fa416d2a61
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2277728Reviewed-by: Egor Pasko <pasko@chromium.org>
Reviewed-by: John Chen <johnchen@chromium.org>
Reviewed-by: Sami Kyöstilä <skyostil@chromium.org>
Commit-Queue: Mikhail Khokhlov <khokhlov@google.com>
Cr-Commit-Position: refs/heads/master@{#784501}

tools/perf/benchmarks/startup_mobile.py

@@ -11,6 +11,7 @@ from core import platforms
 from telemetry.core import android_platform
 from telemetry.core import util as core_util
 from telemetry.internal.browser import browser_finder
+from telemetry.internal.platform import android_device
 from telemetry.timeline import chrome_trace_category_filter
 from telemetry.util import wpr_modes
 from telemetry.web_perf import timeline_based_measurement
@@ -91,7 +92,9 @@ class _MobileStartupSharedState(story_module.SharedState):
     self._finder_options.browser_options.AppendExtraBrowserArgs(
         '--skip-webapk-verification')
     self.platform.Initialize()
-    self.platform.SetFullPerformanceModeEnabled(True)
+    self.platform.SetPerformanceMode(finder_options.performance_mode)
+    self._perf_mode_set = (finder_options.performance_mode !=
+                           android_device.KEEP_PERFORMANCE_MODE)
     maps_webapk = core_util.FindLatestApkOnHost(
         finder_options.chrome_root, 'MapsWebApk.apk')
     if not maps_webapk:
@@ -122,7 +125,8 @@ class _MobileStartupSharedState(story_module.SharedState):
 
   def TearDownState(self):
     self.platform.network_controller.Close()
-    self.platform.SetFullPerformanceModeEnabled(False)
+    if self._perf_mode_set:
+      self.platform.SetPerformanceMode(android_device.NORMAL_PERFORMANCE_MODE)
 
   def LaunchBrowser(self, url, flush_caches):
     if flush_caches: