touch: Always expect XInput2 availability.

base/message_pump_x.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef BASE_MESSAGE_PUMP_X_H
 #define BASE_MESSAGE_PUMP_X_H
 
 #include "base/message_pump.h"
 #include "base/message_pump_glib.h"
 
@@ skipping 83 matching lines @@
 
   // Sends the event to the observers. If an observer returns true, then it does
   // not send the event to any other observers and returns true. Returns false
   // if no observer returns true.
   bool WillProcessXEvent(XEvent* xevent);
 
   // Update the lookup table and flag the events that should be captured and
   // processed so that GDK doesn't get to them.
   void InitializeEventsToCapture(void);
 
-#if defined(HAVE_XINPUT2)
   // Initialize X2 input.
   void InitializeXInput2(void);
 
   // The opcode used for checking events.
   int xiopcode_;
-#endif
 
   // The event source for GDK events.
   GSource* gdksource_;
 
   // The default GDK event dispatcher. This is stored so that it can be restored
   // when necessary during nested event dispatching.
   gboolean (*gdkdispatcher_)(GSource*, GSourceFunc, void*);
 
   // Indicates whether a GDK event was injected by chrome (when |true|) or if it
   // was captured and being processed by GDK (when |false|).
@@ skipping 18 matching lines @@
   std::bitset<GDK_EVENT_LAST> capture_gdk_events_;
 
   DISALLOW_COPY_AND_ASSIGN(MessagePumpX);
 };
 
 typedef MessagePumpX MessagePumpForUI;
 
 }  // namespace base
 
 #endif  // BASE_MESSAGE_PUMP_X_H