Set scale/orientation property to aura root window

ash/ash_switches.cc

Index: ash/ash_switches.cc
diff --git a/ash/ash_switches.cc b/ash/ash_switches.cc
index ca42f4525761fa6465860d80d533cf2dde4b1afa..a2f30ff43f1498727306403ae4742d68fc55f3b4 100644
--- a/ash/ash_switches.cc
+++ b/ash/ash_switches.cc
@@ -100,5 +100,11 @@ const char kAuraLegacyPowerButton[] = "aura-legacy-power-button";
 // Avoid drawing drop shadows under windows.
 const char kAuraNoShadows[] = "aura-no-shadows";
 
+// Overrides all display's orientation. The value should be one of 0

[Daniel Erat, 2013/01/30 23:52:46]

nit: s/display's/displays'/ (since displays is plural)

[oshima, 2013/01/31 00:04:56]

Done.

+// (normal), 1 (90 degrees clock wise), 2 (180 degrees) or 3 (270

[Daniel Erat, 2013/01/30 23:52:46]

nit: s/clock wise/clockwise/

[oshima, 2013/01/31 00:04:56]

Done.

+// degrees clockwise).
+const char kAshOverrideDisplayOrientation[] =
+    "ash-override-display-orientation";
+
 }  // namespace switches
 }  // namespace ash