Support startup performance tests on Galaxy S3

build/android/pylib/flag_changer.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.
 
 import constants
 import traceback
 import warnings
 
 
 # Location where chrome reads command line flags from
@@ skipping 71 matching lines @@
   def Restore(self):
     """Restores the flags to their original state."""
     self._current_flags = self._TokenizeFlags(self._orig_line)
     self._UpdateCommandLineFile()
 
   def _UpdateCommandLineFile(self):
     """Writes out the command line to the file, or removes it if empty."""
     print "Current flags: ", self._current_flags
 
     if self._current_flags:
-      self._android_cmd.SetFileContents(CHROME_COMMAND_FILE,
+      self._android_cmd.SetProtectedFileContents(CHROME_COMMAND_FILE,

[frankf, 2013/01/17 18:45:39]

alignment.

                                         'chrome ' +
                                         ' '.join(self._current_flags))
     else:
-      self._android_cmd.RunShellCommand('rm ' + CHROME_COMMAND_FILE)
+      self._android_cmd.RunShellCommand('su -c rm ' + CHROME_COMMAND_FILE)
 
   def _TokenizeFlags(self, line):
     """Changes the string containing the command line into a list of flags.
 
     Follows similar logic to CommandLine.java::tokenizeQuotedArguments:
     * Flags are split using whitespace, unless the whitespace is within a
       pair of quotation marks.
     * Unlike the Java version, we keep the quotation marks around switch
       values since we need them to re-create the file when new flags are
       appended.
@@ skipping 28 matching lines @@
 
     # Tack on the last flag.
     if not current_flag:
       if within_quotations:
         warnings.warn("Unterminated quoted string: " + current_flag)
     else:
       tokenized_flags.append(current_flag)
 
     # Return everything but the program name.
     return tokenized_flags[1:]