Desktop Aura: Allow tab drags out of window.

base/message_loop.h

 // Copyright (c) 2012 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_LOOP_H_
 #define BASE_MESSAGE_LOOP_H_
 
 #include <queue>
 #include <string>
 
@@ skipping 12 matching lines @@
 #include "base/time.h"
 
 #if defined(OS_WIN)
 // We need this to declare base::MessagePumpWin::Dispatcher, which we should
 // really just eliminate.
 #include "base/message_pump_win.h"
 #elif defined(OS_POSIX)
 #include "base/message_pump_libevent.h"
 #if !defined(OS_MACOSX) && !defined(OS_ANDROID)
 
-#if defined(USE_AURA) && !defined(OS_NACL)
+#if defined(USE_AURA) && defined(USE_X11) && !defined(OS_NACL)
 #include "base/message_pump_aurax11.h"
 #else
 #include "base/message_pump_gtk.h"
 #endif
 
 #endif
 #endif
 
 namespace base {
 class Histogram;
@@ skipping 520 matching lines @@
   // never be called. Instead use Start(), which will forward all the native UI
   // events to the Java message loop.
   void Start();
 #elif !defined(OS_MACOSX)
   // Please see message_pump_win/message_pump_glib for definitions of these
   // methods.
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
  protected:
+#if defined(USE_AURA) && defined(USE_X11) && !defined(OS_NACL)
+  friend class base::MessagePumpAuraX11;
+#endif
+
   // TODO(rvargas): Make this platform independent.
   base::MessagePumpForUI* pump_ui() {
     return static_cast<base::MessagePumpForUI*>(pump_.get());
   }
 #endif  // !defined(OS_MACOSX)
 };
 
 // Do not add any member variables to MessageLoopForUI!  This is important b/c
 // MessageLoopForUI is often allocated via MessageLoop(TYPE_UI).  Any extra
 // data that you need should be stored on the MessageLoop's pump_ instance.
@@ skipping 71 matching lines @@
 #endif  // defined(OS_POSIX)
 };
 
 // Do not add any member variables to MessageLoopForIO!  This is important b/c
 // MessageLoopForIO is often allocated via MessageLoop(TYPE_IO).  Any extra
 // data that you need should be stored on the MessageLoop's pump_ instance.
 COMPILE_ASSERT(sizeof(MessageLoop) == sizeof(MessageLoopForIO),
                MessageLoopForIO_should_not_have_extra_member_variables);
 
 #endif  // BASE_MESSAGE_LOOP_H_