Support startup performance tests on Galaxy S3

build/android/pylib/device_stats_monitor.py

 # Copyright (c) 2012 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.
 
 """Utilities for iotop/top style profiling for android."""
 
 import collections
 import json
 import os
 import subprocess
@@ skipping 20 matching lines @@
 
   def __init__(self, adb, hz, build_type):
     self._adb = adb
     host_path = os.path.abspath(os.path.join(
         constants.CHROME_DIR, 'out', build_type, 'device_stats_monitor'))
     self._adb.PushIfNeeded(host_path, DeviceStatsMonitor.DEVICE_PATH)
     self._hz = hz
 
   def Start(self):
     """Starts device stats monitor on the device."""
-    self._adb.SetFileContents(DeviceStatsMonitor.PROFILE_PATH, '')
+    self._adb.SetProtectedFileContents(DeviceStatsMonitor.PROFILE_PATH, '')
     self._process = subprocess.Popen(
         ['adb', 'shell', '%s --hz=%d %s' % (
             DeviceStatsMonitor.DEVICE_PATH, self._hz,
             DeviceStatsMonitor.PROFILE_PATH)])
 
   def StopAndCollect(self, output_path):
     """Stops monitoring and saves results.
 
     Args:
       output_path: Path to save results.
@@ skipping 55 matching lines @@
                                         'user',
                                         'nice',
                                         'system',
                                         'idle',
                                         'iowait',
                                         'irq',
                                         'softirq',
                                        ])
     fields = line.split()
     return cpu_stats._make([fields[0]] + [int(f) for f in fields[1:8]])