[Android] Switch KillAll, StartActivity, and BroadcastIntent to DeviceUtils.

build/android/pylib/perf/perf_control.py

Index: build/android/pylib/perf/perf_control.py
diff --git a/build/android/pylib/perf/perf_control.py b/build/android/pylib/perf/perf_control.py
index 1c88945e2d19592203af90aeca57df9fef0c0382..3d140598168ee60cc33750f850407f84fea0062e 100644
--- a/build/android/pylib/perf/perf_control.py
+++ b/build/android/pylib/perf/perf_control.py
@@ -73,11 +73,11 @@ class PerfControl(object):
     """
     def ForceCpuOnline(online_path):
       script = 'chmod 644 {0}; echo 1 > {0}; chmod 444 {0}'.format(online_path)
-      self._device.RunShellCommand(script, root=True)
+      self._device.RunShellCommand(script, as_root=True)
       return self._device.old_interface.GetFileContents(online_path)[0] == '1'
 
     def ResetCpu(online_path):
-      self._device.RunShellCommand('chmod 644 %s' % online_path, root=True)
+      self._device.RunShellCommand('chmod 644 %s' % online_path, as_root=True)
 
     def WaitFor(condition):
       for _ in range(100):