Continue with the FreeBSD port - this version builds and links, though...

base/message_loop.h

Index: base/message_loop.h
===================================================================
--- base/message_loop.h	(revision 25977)
+++ base/message_loop.h	(working copy)
@@ -22,7 +22,7 @@
 #elif defined(OS_POSIX)
 #include "base/message_pump_libevent.h"
 #endif
-#if defined(OS_LINUX)
+#if defined(USE_X11)
 #include "base/message_pump_glib.h"
 #endif
 
@@ -237,7 +237,7 @@
 #if defined(OS_WIN)
   typedef base::MessagePumpWin::Dispatcher Dispatcher;
   typedef base::MessagePumpWin::Observer Observer;
-#elif defined(OS_LINUX)
+#elif defined(USE_X11)
   typedef base::MessagePumpForUI::Dispatcher Dispatcher;
   typedef base::MessagePumpForUI::Observer Observer;
 #endif
@@ -252,7 +252,7 @@
     // once it becomes idle.
     bool quit_received;
 
-#if defined(OS_WIN) || defined(OS_LINUX)
+#if defined(OS_WIN) || defined(USE_X11)
     Dispatcher* dispatcher;
 #endif
   };
@@ -436,7 +436,7 @@
   void PumpOutPendingPaintMessages();
 #endif
 
-#if defined(OS_WIN) || defined(OS_LINUX)
+#if defined(OS_WIN) || defined(USE_X11)
   // Please see message_pump_win/message_pump_glib for definitions of these
   // methods.
   void AddObserver(Observer* observer);
@@ -448,7 +448,7 @@
   base::MessagePumpForUI* pump_ui() {
     return static_cast<base::MessagePumpForUI*>(pump_.get());
   }
-#endif  // defined(OS_WIN) || defined(OS_LINUX)
+#endif  // defined(OS_WIN) || defined(USE_X11)
 };
 
 // Do not add any member variables to MessageLoopForUI!  This is important b/c