Linux: GCC 4.4 fix.

http://codereview.chromium.org/126149


git-svn-id: svn://svn.chromium.org/chrome/trunk/src@18419 0039d316-1c4b-4281-b951-d872f2087c98

base/message_pump_glib_unittest.cc

@@ -5,8 +5,11 @@
 #include "base/message_pump_glib.h"
 
 #include <gtk/gtk.h>
+#include <math.h>
+
 #include <algorithm>
 #include <vector>
+
 #include "base/logging.h"
 #include "base/message_loop.h"
 #include "base/platform_thread.h"