| Index: content/browser/compositor/software_output_device_x11.cc | 
| diff --git a/content/browser/compositor/software_output_device_x11.cc b/content/browser/compositor/software_output_device_x11.cc | 
| index d2e6606166f84cd7be982a5384da8c42ed23642e..80686821ed58e624f64359e9081d3d6750089ac1 100644 | 
| --- a/content/browser/compositor/software_output_device_x11.cc | 
| +++ b/content/browser/compositor/software_output_device_x11.cc | 
| @@ -10,6 +10,8 @@ | 
| #include <X11/Xlib.h> | 
| #include <X11/Xutil.h> | 
|  | 
| +#undef None // Defined by X11/X.h to 0L which collides with other headers | 
| + | 
| #include "content/public/browser/browser_thread.h" | 
| #include "third_party/skia/include/core/SkImageInfo.h" | 
| #include "ui/base/x/x11_util.h" | 
|  |