Unified Desktop: hook up ash to allow unified desktop mode

ash/ash_switches.h

Index: ash/ash_switches.h
diff --git a/ash/ash_switches.h b/ash/ash_switches.h
index 40aba02fb37a7eda2e79a667b8f059b382ddb080..171272fe72de9dec256ef76c58d101363bde7081 100644
--- a/ash/ash_switches.h
+++ b/ash/ash_switches.h
@@ -18,7 +18,6 @@ namespace switches {
 
 // Please keep alphabetized.
 ASH_EXPORT extern const char kAshAnimateFromBootSplashScreen[];
-ASH_EXPORT extern const char kAshConstrainPointerToRoot[];
 ASH_EXPORT extern const char kAshCopyHostBackgroundAtBoot[];
 ASH_EXPORT extern const char kAshDebugShortcuts[];
 ASH_EXPORT extern const char kAshDisableLockLayoutManager[];
@@ -47,6 +46,13 @@ ASH_EXPORT extern const char kAuraLegacyPowerButton[];
 ASH_EXPORT extern const char kForceAshToDesktop[];
 #endif
 
+#if defined(OS_CHROMEOS)
+// True if the pointer (cursor) position should be kept inside root windows.
+ASH_EXPORT bool ConstrainPointerToRoot();
+
+ASH_EXPORT bool UnifiedDesktopEnabled();
+#endif
+
 }  // namespace switches
 }  // namespace ash