Linux: move X operations from the IO to UI2 thread.

webkit/tools/test_shell/test_shell_x11.h

Index: webkit/tools/test_shell/test_shell_x11.h
diff --git a/webkit/tools/test_shell/test_shell_x11.h b/webkit/tools/test_shell/test_shell_x11.h
new file mode 100644
index 0000000000000000000000000000000000000000..a17356dd4b7828a4e2c6b28d0bd9c918049d654b
--- /dev/null
+++ b/webkit/tools/test_shell/test_shell_x11.h
@@ -0,0 +1,18 @@
+#ifndef WEBKIT_TOOLS_TEST_SHELL_TEST_SHELL_X11_H
+#define WEBKIT_TOOLS_TEST_SHELL_TEST_SHELL_X11_H
+
+// This header is required because one cannot include both Xlib headers and
+// WebKit headers in the same source file.
+
+typedef struct _XDisplay Display;
+
+namespace test_shell_x11 {
+
+// Return an Xlib Display pointer for the given widget
+Display* GtkWidgetGetDisplay(GtkWidget* widget);
+// Return the screen number for the given widget
+int GtkWidgetGetScreenNum(GtkWidget* widget);
+
+}  // namespace test_shell_x11
+
+#endif  // !WEBKIT_TOOLS_TEST_SHELL_TEST_SHELL_X11_H