Enable the FocusController on DesktopAura too.

ui/views/corewm/corewm_switches.cc

Index: ui/views/corewm/corewm_switches.cc
===================================================================
--- ui/views/corewm/corewm_switches.cc	(revision 180150)
+++ ui/views/corewm/corewm_switches.cc	(working copy)
@@ -14,6 +14,10 @@
 // CoreWM FocusController.
 const char kDisableFocusController[] = "disable-focus-controller";
 
+// When set uses the FocusController in desktop mode.
+const char kEnableFocusControllerOnDesktop[] =
+    "enable-focus-controller-on-desktop";
+
 // If present animations are disabled.
 const char kWindowAnimationsDisabled[] =
     "views-corewm-window-animations-disabled";
@@ -25,5 +29,10 @@
       switches::kDisableFocusController);
 }
 
+bool UseFocusControllerOnDesktop() {
+  return CommandLine::ForCurrentProcess()->HasSwitch(
+      switches::kEnableFocusControllerOnDesktop);
+}
+
 }  // namespace corewm
 }  // namespace views