Support startup performance tests on Galaxy S3

build/android/pylib/flag_changer.py

Index: build/android/pylib/flag_changer.py
diff --git a/build/android/pylib/flag_changer.py b/build/android/pylib/flag_changer.py
index 8b8dbca59055f4a4c7ac1005fd95669ef599dd11..2c5e203b46edd24f604631004ff8bb540e5ddca9 100644
--- a/build/android/pylib/flag_changer.py
+++ b/build/android/pylib/flag_changer.py
@@ -89,11 +89,13 @@ class FlagChanger(object):
     print "Current flags: ", self._current_flags
 
     if self._current_flags:
-      self._android_cmd.SetFileContents(CHROME_COMMAND_FILE,
-                                        'chrome ' +
-                                        ' '.join(self._current_flags))
+      # Can't use SetFileContents since that uses push, which doesn't work
+      # on user type builds for protected files.
+      self._android_cmd.RunShellCommand(

[bulach, 2013/01/14 17:26:50]

nit: the escaping makes it hard to read :)
how about SetFileContents to somewhere public in $STORAGE_CARD, then use 
"su cp SRC TARGET"

[aberent, 2013/01/14 20:19:10]

It didn't work anyway, once I retested it, so that is what I am ending up with.
I don't know how it worked first time.
See my next patch.

+          'su -c echo \"' + 'chrome ' + ' '.join(self._current_flags) +
+          ' > ' + CHROME_COMMAND_FILE + '\"')
     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.