The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/ee9ee6345abd0cfeb8a5b94446a278acdfe69e24

commit ee9ee6345abd0cfeb8a5b94446a278acdfe69e24
Author: Joe Downing <joedow@chromium.org>
Date: Wed Aug 15 16:30:02 2018

[Windows Host] Prevent connection hang for hosts with 3D Display Mode enabled

This change prevents a hang when connecting to a Windows machine
which has curtain mode and 3d display mode enabled.  The root cause
of the hang is that creating a D3D11 device takes several seconds so
function calls which used to take a few milliseconds now take 5+
seconds.  I did not see a mechanism to control this display mode
programatically so I am adding code which can detect the condition
and the logic to prevent D3D usage when 3D mode is enabled.

Of note is the change in BasicDesktopEnvironment where I requery the
D3D apis.  DesktopEnvironmentOptions are queried in Session 0 and
then passed on to the Desktop process.  There is a non-obvious
problem with this as many D3D methods cannot be queried or will
not return reliable results.  This results in a base set of options
being set in Session 0 (which includes user / experiment overrides)
and then passed into a session where D3D will return new values.  In
this CL, I requery the D3D APIs and update the capturer options if
they should be disabled.

BUG= 836007 

Change-Id: Ib7a6e61fa7987bd093e93a6100b97cc49e3aff05
Reviewed-on: https://chromium-review.googlesource.com/1164403
Commit-Queue: Joe Downing <joedow@chromium.org>
Reviewed-by: Jamie Walch <jamiewalch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#583276}
[modify] https://crrev.com/ee9ee6345abd0cfeb8a5b94446a278acdfe69e24/remoting/host/basic_desktop_environment.cc
[modify] https://crrev.com/ee9ee6345abd0cfeb8a5b94446a278acdfe69e24/remoting/host/desktop_environment_options.cc
[modify] https://crrev.com/ee9ee6345abd0cfeb8a5b94446a278acdfe69e24/remoting/host/evaluate_capability.cc
[modify] https://crrev.com/ee9ee6345abd0cfeb8a5b94446a278acdfe69e24/remoting/host/host_attributes.cc
[modify] https://crrev.com/ee9ee6345abd0cfeb8a5b94446a278acdfe69e24/remoting/host/switches.cc
[modify] https://crrev.com/ee9ee6345abd0cfeb8a5b94446a278acdfe69e24/remoting/host/switches.h
[modify] https://crrev.com/ee9ee6345abd0cfeb8a5b94446a278acdfe69e24/remoting/host/win/BUILD.gn
[add] https://crrev.com/ee9ee6345abd0cfeb8a5b94446a278acdfe69e24/remoting/host/win/evaluate_3d_display_mode.cc
[add] https://crrev.com/ee9ee6345abd0cfeb8a5b94446a278acdfe69e24/remoting/host/win/evaluate_3d_display_mode.h
[modify] https://crrev.com/ee9ee6345abd0cfeb8a5b94446a278acdfe69e24/remoting/host/win/evaluate_d3d.cc
[modify] https://crrev.com/ee9ee6345abd0cfeb8a5b94446a278acdfe69e24/remoting/host/win/evaluate_d3d.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/8cc2653e5d8756652d3e7aabf603ceedcb92a756

commit 8cc2653e5d8756652d3e7aabf603ceedcb92a756
Author: Nico Weber <thakis@chromium.org>
Date: Sun Aug 19 00:04:42 2018

Revert "[Windows Host] Prevent connection hang for hosts with 3D Display Mode enabled"

This reverts commit ee9ee6345abd0cfeb8a5b94446a278acdfe69e24.

Reason for revert: Likely broke remoting tests on Win7,  https://crbug.com/875619 

Original change's description:
> [Windows Host] Prevent connection hang for hosts with 3D Display Mode enabled
> 
> This change prevents a hang when connecting to a Windows machine
> which has curtain mode and 3d display mode enabled.  The root cause
> of the hang is that creating a D3D11 device takes several seconds so
> function calls which used to take a few milliseconds now take 5+
> seconds.  I did not see a mechanism to control this display mode
> programatically so I am adding code which can detect the condition
> and the logic to prevent D3D usage when 3D mode is enabled.
> 
> Of note is the change in BasicDesktopEnvironment where I requery the
> D3D apis.  DesktopEnvironmentOptions are queried in Session 0 and
> then passed on to the Desktop process.  There is a non-obvious
> problem with this as many D3D methods cannot be queried or will
> not return reliable results.  This results in a base set of options
> being set in Session 0 (which includes user / experiment overrides)
> and then passed into a session where D3D will return new values.  In
> this CL, I requery the D3D APIs and update the capturer options if
> they should be disabled.
> 
> BUG= 836007 
> 
> Change-Id: Ib7a6e61fa7987bd093e93a6100b97cc49e3aff05
> Reviewed-on: https://chromium-review.googlesource.com/1164403
> Commit-Queue: Joe Downing <joedow@chromium.org>
> Reviewed-by: Jamie Walch <jamiewalch@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#583276}

TBR=jamiewalch@chromium.org,joedow@chromium.org

# Not skipping CQ checks because original CL landed > 1 day ago.

Bug:  836007 
Change-Id: I464ba6eb37560ef6fc687516e9e33682bee4ac7a
Reviewed-on: https://chromium-review.googlesource.com/1180681
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#584325}
[modify] https://crrev.com/8cc2653e5d8756652d3e7aabf603ceedcb92a756/remoting/host/basic_desktop_environment.cc
[modify] https://crrev.com/8cc2653e5d8756652d3e7aabf603ceedcb92a756/remoting/host/desktop_environment_options.cc
[modify] https://crrev.com/8cc2653e5d8756652d3e7aabf603ceedcb92a756/remoting/host/evaluate_capability.cc
[modify] https://crrev.com/8cc2653e5d8756652d3e7aabf603ceedcb92a756/remoting/host/host_attributes.cc
[modify] https://crrev.com/8cc2653e5d8756652d3e7aabf603ceedcb92a756/remoting/host/switches.cc
[modify] https://crrev.com/8cc2653e5d8756652d3e7aabf603ceedcb92a756/remoting/host/switches.h
[modify] https://crrev.com/8cc2653e5d8756652d3e7aabf603ceedcb92a756/remoting/host/win/BUILD.gn
[delete] https://crrev.com/430971390791ab478e404c174eb13cc56e49f8f8/remoting/host/win/evaluate_3d_display_mode.cc
[delete] https://crrev.com/430971390791ab478e404c174eb13cc56e49f8f8/remoting/host/win/evaluate_3d_display_mode.h
[modify] https://crrev.com/8cc2653e5d8756652d3e7aabf603ceedcb92a756/remoting/host/win/evaluate_d3d.cc
[modify] https://crrev.com/8cc2653e5d8756652d3e7aabf603ceedcb92a756/remoting/host/win/evaluate_d3d.h