| Index: build/common.gypi | 
| diff --git a/build/common.gypi b/build/common.gypi | 
| index c756cd59a814bfcec280d29a2b8c462f565539b6..ab7fd3716e819ce4e977c1199eac257574e03642 100644 | 
| --- a/build/common.gypi | 
| +++ b/build/common.gypi | 
| @@ -483,6 +483,13 @@ | 
| 'use_nss%': 0, | 
| }], | 
|  | 
| +        # libudev usage. | 
| +        ['OS=="linux"', { | 
| +          'use_udev%': 1, | 
| +        }, { | 
| +          'use_udev%': 0, | 
| +        }], | 
| + | 
| # Flags to use X11 on non-Mac POSIX platforms. | 
| ['OS=="win" or OS=="mac" or OS=="ios" or OS=="android" or use_ozone==1', { | 
| 'use_x11%': 0, | 
| @@ -807,6 +814,7 @@ | 
| 'use_cras%': '<(use_cras)', | 
| 'use_openssl%': '<(use_openssl)', | 
| 'use_nss%': '<(use_nss)', | 
| +    'use_udev%': '<(use_udev)', | 
| 'os_bsd%': '<(os_bsd)', | 
| 'os_posix%': '<(os_posix)', | 
| 'use_glib%': '<(use_glib)', | 
|  |