Add more control over sync for Chromium testshell.

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 6eb9f0b3c675f93feb2a827fc1aa31f5a8e1fb48..35efaf185b872f4fb74e2a7a2844cba34e444f4e 100644
--- a/build/android/pylib/flag_changer.py
+++ b/build/android/pylib/flag_changer.py
@@ -8,9 +8,6 @@ import traceback
 import warnings
 
 
-# Location where chrome reads command line flags from
-CHROME_COMMAND_FILE = '/data/local/chrome-command-line'
-
 class FlagChanger(object):
   """Changes the flags Chrome runs with.
 
@@ -21,11 +18,14 @@ class FlagChanger(object):
     once the tests have completed.
   """
 
-  def __init__(self, android_cmd):
+  def __init__(self, android_cmd,
+               command_line_file=constants.CHROME_COMMAND_LINE_FILE):
     self._android_cmd = android_cmd
+    self._command_line_file = command_line_file
+    logging.info('Command line file: %s', self._command_line_file)
 
     # Save the original flags.
-    self._orig_line = self._android_cmd.GetFileContents(CHROME_COMMAND_FILE)
+    self._orig_line = self._android_cmd.GetFileContents(self._command_line_file)
     if self._orig_line:
       self._orig_line = self._orig_line[0].strip()
 
@@ -90,11 +90,11 @@ class FlagChanger(object):
     logging.info('Current flags: %s', self._current_flags)
 
     if self._current_flags:
-      self._android_cmd.SetProtectedFileContents(CHROME_COMMAND_FILE,
+      self._android_cmd.SetProtectedFileContents(self._command_line_file,
                                         'chrome ' +
                                         ' '.join(self._current_flags))
     else:
-      self._android_cmd.RunShellCommand('su -c rm ' + CHROME_COMMAND_FILE)
+      self._android_cmd.RunShellCommand('su -c rm ' + self._command_line_file)
 
   def _TokenizeFlags(self, line):
     """Changes the string containing the command line into a list of flags.