Linux: Add xcb FD to glib event loop

chrome/browser/chrome_browser_main_extra_parts_x11.cc

Index: chrome/browser/chrome_browser_main_extra_parts_x11.cc
diff --git a/chrome/browser/chrome_browser_main_extra_parts_x11.cc b/chrome/browser/chrome_browser_main_extra_parts_x11.cc
index 76e8fb9fc4900d814705b855885ce873a6a9d2c8..9b81eb483cf37a06a920ca7bb06217d6a0fe5d49 100644
--- a/chrome/browser/chrome_browser_main_extra_parts_x11.cc
+++ b/chrome/browser/chrome_browser_main_extra_parts_x11.cc
@@ -19,6 +19,11 @@
 #include "ui/base/x/x11_util_internal.h"
 #include "ui/events/platform/x11/x11_event_source.h"
 
+#ifdef USE_GLIB
+#include "ui/base/x/x11_window_cache.h"
+#include "ui/base/x/x11_window_cache_event_source.h"
+#endif
+
 using content::BrowserThread;
 
 namespace {
@@ -98,6 +103,9 @@ void ChromeBrowserMainExtraPartsX11::PostMainMessageLoopStart() {
   // if X exits before us.
   ui::SetX11ErrorHandlers(BrowserX11ErrorHandler, BrowserX11IOErrorHandler);
 
+  new ui::XWindowCacheEventSource(new ui::XWindowCache(
+      gfx::GetXDisplay(), DefaultRootWindow(gfx::GetXDisplay())));
+
 #if !defined(OS_CHROMEOS)
   // It is possible for X11EventSource to not have been created (e.g. when
   // running as a mus client).