Add FakeDisplayDelegate for off device usage.

ui/display/display_switches.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "build/build_config.h"
 #include "ui/display/display_switches.h"
 
 namespace switches {
 
 // TODO(rjkroege): Some of these have an "ash" prefix. When ChromeOS startup
 // scripts have been updated, the leading "ash" prefix should be removed.
 
+// Specifies the initial display bounds for VirtualDisplayDelegate, see class
+// for format details.
+const char kDisplayBounds[] = "display-bounds";

[rjkroege, 2016/09/12 20:31:05]

this is redundant with HostDisplayBounds? Refactor please?

[kylechar, 2016/09/13 14:15:01]

They're similar but incompatible, so I think a different name is appropriate?

Although, I think --display-config= is maybe a better flag name. The
--ash-window-host-bounds= no longer matches reality (it's used to specify much
more than just bounds) although it was probably accurate at some point.

+
 // Overrides the device scale factor for the browser UI and the contents.
 const char kForceDeviceScaleFactor[] = "force-device-scale-factor";
 
 // Specifies the layout mode and offsets for the secondary display for
 // testing. The format is "<t|r|b|l>,<offset>" where t=TOP, r=RIGHT,
 // b=BOTTOM and L=LEFT. For example, 'r,-100' means the secondary display
 // is positioned on the right with -100 offset. (above than primary)
 const char kSecondaryDisplayLayout[] = "secondary-display-layout";
 
 // Enables software based mirroring.
@@ skipping 13 matching lines @@
 
 #if defined(OS_CHROMEOS)
 const char kDisableDisplayColorCalibration[] =
     "disable-display-color-calibration";
 
 // Enables unified desktop mode.
 const char kEnableUnifiedDesktop[] = "ash-enable-unified-desktop";
 #endif
 
 }  // namespace switches