Revert 269892 "linux_aura: Compile ash into chrome."

trunk/src/ash/host/ash_window_tree_host_x11.h

Index: trunk/src/ash/host/ash_window_tree_host_x11.h
===================================================================
--- trunk/src/ash/host/ash_window_tree_host_x11.h	(revision 269901)
+++ trunk/src/ash/host/ash_window_tree_host_x11.h	(working copy)
@@ -55,11 +55,9 @@
   // Update is_internal_display_ based on the current state.
   void UpdateIsInternalDisplay();
 
-#if defined(OS_CHROMEOS)
   // Set the CrOS touchpad "tap paused" property. It is used to temporarily
   // turn off the Tap-to-click feature when the mouse pointer is invisible.
   void SetCrOSTapPaused(bool state);
-#endif
 
   // True if the root host resides on the internal display
   bool is_internal_display_;