Remove pyautolib dependency

Removed 'pyautolib' dependencies from install_test and removed some common code from run_install_test.py. Also, modified util.py and copied DoesUrlExist to it, so install_test doesn't have to depend on 'pyautolib.pyauto_utils'.

BUG=163708, 163718
NOTRY=true

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=173176

[nkang, 2012-12-13 00:55:17]

Removed all dependencies on 'pyautolib' from install_test and removed some
common code from run_install_test.py, which was moved to the new 'pylib' folder.
Also, copied DoesUrlExist method from pyauto_utils.py to util.py, so we can
eliminate all dependencies on 'pyautolib'.

[kkania, 2012-12-13 18:42:01]

lgtm, but you need to get a review from an owner of pylib

[nkang1, 2012-12-13 19:18:12]

Added Pawel Hajdan for owner's review.

[Paweł Hajdan Jr., 2012-12-13 19:28:01]

https://codereview.chromium.org/11553041/diff/1/install_test/install_test.py
File install_test/install_test.py (left):

https://codereview.chromium.org/11553041/diff/1/install_test/install_test.py#...
install_test/install_test.py:157: options.append('--installerdata="%s"' %
master_pref)
What's the problem with quotes here?

[nkang1, 2012-12-13 19:45:59]

Addressed the comment made by Paweł.

https://codereview.chromium.org/11553041/diff/1/install_test/install_test.py
File install_test/install_test.py (left):

https://codereview.chromium.org/11553041/diff/1/install_test/install_test.py#...
install_test/install_test.py:157: options.append('--installerdata="%s"' %
master_pref)
On 2012/12/13 19:28:02, Paweł Hajdan Jr. wrote:
> What's the problem with quotes here?

The installer doesn't load the master preferences file if quotes are added.
That's why we decided to remove them.

[Paweł Hajdan Jr., 2012-12-14 16:45:24]

LGTM

[commit-bot: I haz the power, 2012-12-14 18:31:33]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/nkang@chromium.org/11553041/1

[commit-bot: I haz the power, 2012-12-14 18:35:06]

Change committed as 173176