autox: Add support for creating and querying windows.

autox: Add support for creating and querying windows.

The asynchronous stuff makes this a bit tricky -- we wait
for a window to be mapped and exposed before returning
from create_and_map_window() (in case the caller wants to,
say, take a screenshot), and provide an await_condition()
method that will hopefully mask delays between when a test
makes a request and when the change is actually applied by
the window manager.

BUG=none
TEST=tried it with a little test script; it works

[sosa, 2010-03-25 16:27:46]

Sorry the review took some time but I had to look up some x func's.   Some
optional feedback but o/w lgtm

http://codereview.chromium.org/1292003/diff/1/2
File src/platform/autox/autox.py (right):

http://codereview.chromium.org/1292003/diff/1/2#newcode284
src/platform/autox/autox.py:284: if condition():
Can you compress the first self.sync / condition check into the beginning of
this loop (before you check remaining time) and remove it from the bottom of the
loop?

[Daniel Erat, 2010-03-25 16:41:26]

Thanks.  I made a few more changes while you were reviewing, if you don't mind
taking another quick look.

http://codereview.chromium.org/1292003/diff/1/2
File src/platform/autox/autox.py (right):

http://codereview.chromium.org/1292003/diff/1/2#newcode284
src/platform/autox/autox.py:284: if condition():
On 2010/03/25 16:27:46, sosa wrote:
> Can you compress the first self.sync / condition check into the beginning of
> this loop (before you check remaining time) and remove it from the bottom of
the
> loop?

Good suggestion; I've restructured this.

[sosa, 2010-03-25 16:43:46]

lgtm