Add FakeDisplayDelegate for off device usage.

ui/display/display_switches.cc

Index: ui/display/display_switches.cc
diff --git a/ui/display/display_switches.cc b/ui/display/display_switches.cc
index 445b0c635900e693e5e5741da2349dd6f9be160e..753e4d5200d2d11f986b7f64d0fcffe0933b51b4 100644
--- a/ui/display/display_switches.cc
+++ b/ui/display/display_switches.cc
@@ -10,30 +10,34 @@ 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.
 
+// Enables software based mirroring.
+const char kEnableSoftwareMirroring[] = "ash-enable-software-mirroring";
+
 // Overrides the device scale factor for the browser UI and the contents.
 const char kForceDeviceScaleFactor[] = "force-device-scale-factor";
 
+// Sets a window size, optional position, and optional scale factor.
+// "1024x768" creates a window of size 1024x768.
+// "100+200-1024x768" positions the window at 100,200.
+// "1024x768*2" sets the scale factor to 2 for a high DPI display.
+// "800,0+800-800x800" for two displays at 800x800 resolution.
+// "800,0+800-800x800,0+1600-800x800" for three displays at 800x800 resolution.
+const char kHostWindowBounds[] = "ash-host-window-bounds";
+
 // 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.
-const char kEnableSoftwareMirroring[] = "ash-enable-software-mirroring";
+// Specifies the initial screen configuration, or state of all displays, for
+// FakeDisplayDelegate, see class for format details.
+const char kScreenConfig[] = "screen-config";
 
 // Uses the 1st display in --ash-host-window-bounds as internal display.
 // This is for debugging on linux desktop.
 const char kUseFirstDisplayAsInternal[] = "ash-use-first-display-as-internal";
 
-// Sets a window size, optional position, and optional scale factor.
-// "1024x768" creates a window of size 1024x768.
-// "100+200-1024x768" positions the window at 100,200.
-// "1024x768*2" sets the scale factor to 2 for a high DPI display.
-// "800,0+800-800x800" for two displays at 800x800 resolution.
-// "800,0+800-800x800,0+1600-800x800" for three displays at 800x800 resolution.
-const char kHostWindowBounds[] = "ash-host-window-bounds";
-
 #if defined(OS_CHROMEOS)
 const char kDisableDisplayColorCalibration[] =
     "disable-display-color-calibration";