Fix docked browser window sometimes appears onscreen after restart

Change IsMaximized() to return false if the window is in the dock, and
a unit test to make sure this is always the case. It turns out
-isZoomed can sometimes return YES for a docked window, which
sometimes results in the window becoming undocked on the next restart.
Please read the long entry in the bug report for a complete explanation
of how the change fixes the problem.

BUG=452976
Committed: https://crrev.com/de8b6d82a032a4bde620e43e6c580850871d59d8
Cr-Commit-Position: refs/heads/master@{#323928}

[shrike, 2015-04-06 17:32:51]

shrike@chromium.org changed reviewers:
+ avi@chromium.org

[shrike, 2015-04-06 18:06:11]

PTAL

[Avi (use Gerrit), 2015-04-06 18:57:09]

Oh, that looked like fun! LGTM

[shrike, 2015-04-06 18:58:52]

The CQ bit was checked by shrike@chromium.org

[commit-bot: I haz the power, 2015-04-06 18:59:31]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1055893003/1

[commit-bot: I haz the power, 2015-04-06 19:03:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-06 19:04:47]

Patchset 1 (id:??) landed as
https://crrev.com/de8b6d82a032a4bde620e43e6c580850871d59d8
Cr-Commit-Position: refs/heads/master@{#323928}

[Sergey Ulanov, 2015-04-06 22:18:26]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1061103003/ by sergeyu@chromium.org.

The reason for reverting is: Broke BrowserWindowCocoaTest.TestMinimizeState on
10.6:
https://build.chromium.org/p/chromium.mac/builders/Mac10.6%20Tests/builds/762.

[shrike, 2015-04-06 23:47:33]

On 2015/04/06 22:18:26, Sergey Ulanov wrote:
> A revert of this CL (patchset #1 id:1) has been created in
> https://codereview.chromium.org/1061103003/ by mailto:sergeyu@chromium.org.
> 
> The reason for reverting is: Broke BrowserWindowCocoaTest.TestMinimizeState on
> 10.6:
> https://build.chromium.org/p/chromium.mac/builders/Mac10.6%20Tests/builds/762.

Continuing to https://codereview.chromium.org/1062053002/