aura: A few changes to have aura_demo compile and run on linux.

base/message_loop.cc

 // 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.
 
 #include "base/message_loop.h"
 
 #include <algorithm>
 
 #include "base/bind.h"
 #include "base/compiler_specific.h"
@@ skipping 133 matching lines @@
 #define MESSAGE_PUMP_IO new base::MessagePumpForIO()
 #elif defined(OS_MACOSX)
 #define MESSAGE_PUMP_UI base::MessagePumpMac::Create()
 #define MESSAGE_PUMP_IO new base::MessagePumpLibevent()
 #elif defined(OS_ANDROID)
 #define MESSAGE_PUMP_UI new base::MessagePumpForUI()
 #define MESSAGE_PUMP_IO new base::MessagePumpLibevent()
 #elif defined(USE_WAYLAND)
 #define MESSAGE_PUMP_UI new base::MessagePumpWayland()
 #define MESSAGE_PUMP_IO new base::MessagePumpLibevent()
-#elif defined(TOUCH_UI)
+#elif defined(TOUCH_UI) || defined(USE_AURA)
 #define MESSAGE_PUMP_UI new base::MessagePumpX()
 #define MESSAGE_PUMP_IO new base::MessagePumpLibevent()
 #elif defined(OS_NACL)
 // Currently NaCl doesn't have a UI or an IO MessageLoop.
 // TODO(abarth): Figure out if we need these.
 #define MESSAGE_PUMP_UI NULL
 #define MESSAGE_PUMP_IO NULL
 #elif defined(OS_POSIX)  // POSIX but not MACOSX.
 #define MESSAGE_PUMP_UI new base::MessagePumpGtk()
 #define MESSAGE_PUMP_IO new base::MessagePumpLibevent()
@@ skipping 681 matching lines @@
                                            Watcher *delegate) {
   return pump_libevent()->WatchFileDescriptor(
       fd,
       persistent,
       static_cast<base::MessagePumpLibevent::Mode>(mode),
       controller,
       delegate);
 }
 
 #endif