Removes files from //build that we don't need

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
deleted file mode 100644
index 718bc3971500b2c94dcaa6606ccc0c364de5ae10..0000000000000000000000000000000000000000
--- a/build/android/pylib/flag_changer.py
+++ /dev/null
@@ -1,166 +0,0 @@
-# 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 logging
-
-import pylib.android_commands
-import pylib.device.device_utils
-
-from pylib.device import device_errors
-
-
-class FlagChanger(object):
-  """Changes the flags Chrome runs with.
-
-  There are two different use cases for this file:
-  * Flags are permanently set by calling Set().
-  * Flags can be temporarily set for a particular set of unit tests.  These
-    tests should call Restore() to revert the flags to their original state
-    once the tests have completed.
-  """
-
-  def __init__(self, device, cmdline_file):
-    """Initializes the FlagChanger and records the original arguments.
-
-    Args:
-      device: A DeviceUtils instance.
-      cmdline_file: Path to the command line file on the device.
-    """
-    # TODO(jbudorick) Remove once telemetry switches over.
-    if isinstance(device, pylib.android_commands.AndroidCommands):
-      device = pylib.device.device_utils.DeviceUtils(device)
-    self._device = device
-    self._cmdline_file = cmdline_file
-
-    # Save the original flags.
-    try:
-      self._orig_line = self._device.ReadFile(self._cmdline_file).strip()
-    except device_errors.CommandFailedError:
-      self._orig_line = ''
-
-    # Parse out the flags into a list to facilitate adding and removing flags.
-    self._current_flags = self._TokenizeFlags(self._orig_line)
-
-  def Get(self):
-    """Returns list of current flags."""
-    return self._current_flags
-
-  def Set(self, flags):
-    """Replaces all flags on the current command line with the flags given.
-
-    Args:
-      flags: A list of flags to set, eg. ['--single-process'].
-    """
-    if flags:
-      assert flags[0] != 'chrome'
-
-    self._current_flags = flags
-    self._UpdateCommandLineFile()
-
-  def AddFlags(self, flags):
-    """Appends flags to the command line if they aren't already there.
-
-    Args:
-      flags: A list of flags to add on, eg. ['--single-process'].
-    """
-    if flags:
-      assert flags[0] != 'chrome'
-
-    # Avoid appending flags that are already present.
-    for flag in flags:
-      if flag not in self._current_flags:
-        self._current_flags.append(flag)
-    self._UpdateCommandLineFile()
-
-  def RemoveFlags(self, flags):
-    """Removes flags from the command line, if they exist.
-
-    Args:
-      flags: A list of flags to remove, eg. ['--single-process'].  Note that we
-             expect a complete match when removing flags; if you want to remove
-             a switch with a value, you must use the exact string used to add
-             it in the first place.
-    """
-    if flags:
-      assert flags[0] != 'chrome'
-
-    for flag in flags:
-      if flag in self._current_flags:
-        self._current_flags.remove(flag)
-    self._UpdateCommandLineFile()
-
-  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."""
-    logging.info('Current flags: %s', self._current_flags)
-    # Root is not required to write to /data/local/tmp/.
-    use_root = '/data/local/tmp/' not in self._cmdline_file
-    if self._current_flags:
-      # The first command line argument doesn't matter as we are not actually
-      # launching the chrome executable using this command line.
-      cmd_line = ' '.join(['_'] + self._current_flags)
-      self._device.WriteFile(
-          self._cmdline_file, cmd_line, as_root=use_root)
-      file_contents = self._device.ReadFile(
-          self._cmdline_file, as_root=use_root).rstrip()
-      assert file_contents == cmd_line, (
-          'Failed to set the command line file at %s' % self._cmdline_file)
-    else:
-      self._device.RunShellCommand('rm ' + self._cmdline_file,
-                                   as_root=use_root)
-      assert not self._device.FileExists(self._cmdline_file), (
-          'Failed to remove the command line file at %s' % self._cmdline_file)
-
-  @staticmethod
-  def _TokenizeFlags(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.
-
-    Args:
-      line: A string containing the entire command line.  The first token is
-            assumed to be the program name.
-    """
-    if not line:
-      return []
-
-    tokenized_flags = []
-    current_flag = ""
-    within_quotations = False
-
-    # Move through the string character by character and build up each flag
-    # along the way.
-    for c in line.strip():
-      if c is '"':
-        if len(current_flag) > 0 and current_flag[-1] == '\\':
-          # Last char was a backslash; pop it, and treat this " as a literal.
-          current_flag = current_flag[0:-1] + '"'
-        else:
-          within_quotations = not within_quotations
-          current_flag += c
-      elif not within_quotations and (c is ' ' or c is '\t'):
-        if current_flag is not "":
-          tokenized_flags.append(current_flag)
-          current_flag = ""
-      else:
-        current_flag += c
-
-    # Tack on the last flag.
-    if not current_flag:
-      if within_quotations:
-        logging.warn('Unterminated quoted argument: ' + line)
-    else:
-      tokenized_flags.append(current_flag)
-
-    # Return everything but the program name.
-    return tokenized_flags[1:]