Merge M52: Ignore desktop creation errors in the sandbox.

Merge M52: Ignore desktop creation errors in the sandbox.

This patch reverts the original behaviour that we ignore errors when creating the alternative desktop. Also this includes a change to try and open the window station with lower privileges if the first request fails, which works fine for operation but not for testing. Finally it logs any failure to create the desktop as a warning in the existing histogram.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.win:win10_chromium_x64_rel_ng
TEST=1. Test on Windows 7
2. Download PSTools from https://technet.microsoft.com/en-us/sysinternals/pstools.aspx
3. Run cmd.exe as an administrator
4. Run the command 'psexec -s -i 0 c:\path\to\chrome.exe'
5. Click on the icon which indicates there a message on the service desktop. This will switch to the service desktop where chrome is running.
6. Verify that the browser is useable

BUG=615396, 638516
Review-Url: https://codereview.chromium.org/2193603004
Cr-Commit-Position: refs/heads/master@{#409229}
(cherry picked from commit 37dd5680ab4edbbf730e8540825b9caa8db0d911)

Review URL: https://codereview.chromium.org/2243543002 .

Cr-Commit-Position: refs/branch-heads/2785@{#565}
Cr-Branched-From: 68623971be0cfc492a2cb0427d7f478e7b214c24-refs/heads/master@{#403382}
(cherry picked from commit 6e54a7bc46d5451ef1019fa243ec964aa9fb4179)

Committed: https://chromium.googlesource.com/chromium/src/+/72d84be035096e74aab4ebb168d2aa221e6bf726

[Will Harris, 2016-08-17 17:28:30]

Description was changed from

==========
Merge M52: Ignore desktop creation errors in the sandbox.

This patch reverts the original behaviour that we ignore errors when creating
the alternative desktop. Also this includes a change to try and open the window
station with lower privileges if the first request fails, which works fine for
operation but not for testing. Finally it logs any failure to create the desktop
as a warning in the existing histogram.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.win:win10_chromium_x64_rel_ng
TEST=1. Test on Windows 7
2. Download PSTools from
https://technet.microsoft.com/en-us/sysinternals/pstools.aspx
3. Run cmd.exe as an administrator
4. Run the command 'psexec -s -i 0 c:\path\to\chrome.exe'
5. Click on the icon which indicates there a message on the service desktop.
This will switch to the service desktop where chrome is running.
6. Verify that the browser is useable

BUG=615396,638516

Review-Url: https://codereview.chromium.org/2193603004
Cr-Commit-Position: refs/heads/master@{#409229}
(cherry picked from commit 37dd5680ab4edbbf730e8540825b9caa8db0d911)

Review URL: https://codereview.chromium.org/2243543002 .

Cr-Commit-Position: refs/branch-heads/2785@{#565}
Cr-Branched-From:
68623971be0cfc492a2cb0427d7f478e7b214c24-refs/heads/master@{#403382}
(cherry picked from commit 6e54a7bc46d5451ef1019fa243ec964aa9fb4179)
==========

to

==========
Merge M52: Ignore desktop creation errors in the sandbox.

This patch reverts the original behaviour that we ignore errors when creating
the alternative desktop. Also this includes a change to try and open the window
station with lower privileges if the first request fails, which works fine for
operation but not for testing. Finally it logs any failure to create the desktop
as a warning in the existing histogram.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.win:win10_chromium_x64_rel_ng
TEST=1. Test on Windows 7
2. Download PSTools from
https://technet.microsoft.com/en-us/sysinternals/pstools.aspx
3. Run cmd.exe as an administrator
4. Run the command 'psexec -s -i 0 c:\path\to\chrome.exe'
5. Click on the icon which indicates there a message on the service desktop.
This will switch to the service desktop where chrome is running.
6. Verify that the browser is useable

BUG=615396,638516

Review-Url: https://codereview.chromium.org/2193603004
Cr-Commit-Position: refs/heads/master@{#409229}
(cherry picked from commit 37dd5680ab4edbbf730e8540825b9caa8db0d911)

Review URL: https://codereview.chromium.org/2243543002 .

Cr-Commit-Position: refs/branch-heads/2785@{#565}
Cr-Branched-From:
68623971be0cfc492a2cb0427d7f478e7b214c24-refs/heads/master@{#403382}
(cherry picked from commit 6e54a7bc46d5451ef1019fa243ec964aa9fb4179)

Committed:
https://chromium.googlesource.com/chromium/src/+/72d84be035096e74aab4ebb168d2...
==========

[Will Harris, 2016-08-17 17:28:34]

Committed patchset #1 (id:1) manually as
72d84be035096e74aab4ebb168d2aa221e6bf726.