Have content/ create and destroy its own threads.

chrome/browser/chromeos/input_method/xkeyboard.cc

Index: chrome/browser/chromeos/input_method/xkeyboard.cc
diff --git a/chrome/browser/chromeos/input_method/xkeyboard.cc b/chrome/browser/chromeos/input_method/xkeyboard.cc
index aaf89d9ee022329b70a84a32c2a521f5c0ff1216..1d37c4e5681796b6260bcfb992a113cee137a304 100644
--- a/chrome/browser/chromeos/input_method/xkeyboard.cc
+++ b/chrome/browser/chromeos/input_method/xkeyboard.cc
@@ -9,9 +9,6 @@
 #include <string>
 #include <utility>
 
-#include <X11/XKBlib.h>
-#include <X11/Xlib.h>
-#include <glib.h>
 #include <stdlib.h>
 #include <string.h>
 
@@ -25,6 +22,11 @@
 #include "content/public/browser/browser_thread.h"
 #include "ui/base/x/x11_util.h"
 
+// These includes conflict with base/tracked_objects.h so must come last.
+#include <X11/XKBlib.h>
+#include <X11/Xlib.h>
+#include <glib.h>
+
 using content::BrowserThread;
 
 namespace chromeos {