Fixed a crash while opening the file open/save dialogs on Windows 7 ASH.

Fixed a crash while opening the file open/save dialogs on Windows 7 ASH.

The operations would get routed to the viewer process under the assumption that it was Windows 8
which would eventually crash while trying to open the metro dialogs which don't work on Windows 7.

Fix is to return false from the ShellDialogsDelegateWin::IsWindowInMetro function for anything below
Windows 8.

BUG=356475
Committed: https://crrev.com/b7f1a20215d4085fe00559f9f2759d9224786c5a
Cr-Commit-Position: refs/heads/master@{#292520}

[ananta, 2014-08-28 01:50:58]

ananta@chromium.org changed reviewers:
+ sky@chromium.org

[sky, 2014-08-28 13:24:58]

LGTM

[ananta, 2014-08-28 19:47:39]

The CQ bit was checked by ananta@chromium.org

[commit-bot: I haz the power, 2014-08-28 19:49:10]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/ananta@chromium.org/510223002/1

[commit-bot: I haz the power, 2014-08-28 20:43:06]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  linux_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu/builds/...)
  linux_chromium_rel_swarming on tryserver.chromium.linux
(http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[commit-bot: I haz the power, 2014-08-28 20:53:21]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2014-08-28 20:53:22]

Try jobs failed on following builders:
  linux_gpu on tryserver.chromium.gpu
(http://build.chromium.org/p/tryserver.chromium.gpu/builders/linux_gpu/builds/...)

[ananta, 2014-08-28 22:09:05]

The CQ bit was checked by ananta@chromium.org

[commit-bot: I haz the power, 2014-08-28 22:10:02]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/ananta@chromium.org/510223002/20001

[commit-bot: I haz the power, 2014-08-28 23:27:50]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  win_chromium_x64_rel_swarming on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[commit-bot: I haz the power, 2014-08-29 00:27:16]

Committed patchset #2 (id:20001) as 2b8e802b6659694752570dd1bd2f9bfbcae5d681

[commit-bot: I haz the power, 2014-09-10 03:04:18]

Patchset 2 (id:??) landed as
https://crrev.com/b7f1a20215d4085fe00559f9f2759d9224786c5a
Cr-Commit-Position: refs/heads/master@{#292520}