create_installer_archive.py: fix pylint errors

This commit fixes the following pylint errors:

************* Module create_installer_archive
W0622:123,8:CopySectionFilesToStagingDir: Redefining built-in 'file'
E0602:146,26:GetPrevVersion: Undefined variable 'options'
E0602:147,35:GetPrevVersion: Undefined variable 'options'
E0602:148,35:GetPrevVersion: Undefined variable 'options'
W0613:142,19:GetPrevVersion: Unused argument 'build_dir'
W0613:173,15:Readconfig: Unused argument 'build_dir'
W0613:238,30:PrepareSetupExec: Unused argument 'staging_dir'
W0106:502,2:_ParseOptions: Expression "(parser.add_option('--staging_dir', help='Staging directory where intermediate files and directories will be created'))" is assigned to nothing
W0106:508,2:_ParseOptions: Expression "(parser.add_option('--resource_file_path', help=('The path where the resource file will be output. Defaults to %s in the build directory.') % (MINI_INSTALLER_INPUT_FILE)))" is assigned to nothing
W0612:536,11:_ParseOptions: Unused variable 'args'

Generated using pylint 0.25.1 and the current depot_tools pylintrc.

While fixing the errors, I also renamed a couple variables to
better reflect their purpose.

BUG=
TEST=


Review URL: https://chromiumcodereview.appspot.com/10392179

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@138607 0039d316-1c4b-4281-b951-d872f2087c98

0 files changed, 0 insertions, 0 deletions