Make it possible to disable udev in linux

content/content_browser.gypi

Index: content/content_browser.gypi
diff --git a/content/content_browser.gypi b/content/content_browser.gypi
index 1fc3c688523d5facc9631a1491f19083326aca08..31b214f4d624c31a3e1823b12cd6530269bd1632 100644
--- a/content/content_browser.gypi
+++ b/content/content_browser.gypi
@@ -392,10 +392,10 @@
     'browser/devtools/worker_devtools_manager.h',
     'browser/devtools/worker_devtools_message_filter.cc',
     'browser/devtools/worker_devtools_message_filter.h',
-    'browser/device_monitor_linux.cc',
-    'browser/device_monitor_linux.h',
     'browser/device_monitor_mac.h',
     'browser/device_monitor_mac.mm',
+    'browser/device_monitor_udev.cc',
+    'browser/device_monitor_udev.h',
     'browser/device_orientation/data_fetcher_impl_android.cc',
     'browser/device_orientation/data_fetcher_impl_android.h',
     'browser/device_orientation/data_fetcher_shared_memory.h',
@@ -1242,7 +1242,7 @@
         '../ui/events/events.gyp:events',
       ],
     }],
-    ['OS!="win" and OS!="mac" and OS!="linux"', {
+    ['OS!="linux" or use_udev==0', {
       'sources': [
         'browser/gamepad/gamepad_platform_data_fetcher.cc',
       ]
@@ -1397,10 +1397,22 @@
     }],
     ['OS=="linux"', {
       'dependencies': [
-        '../build/linux/system.gyp:udev',
         '../sandbox/sandbox.gyp:libc_urandom_override',
       ],
     }],
+    ['use_udev == 1', {
+      'dependencies': [
+        '../build/linux/system.gyp:udev',
+      ],
+    }, {
+      'sources!': [

[rjkroege, 2013/11/18 22:32:19]

I didn't provide adequate information. I meant you to use an entry in
build/filename_rules.gypi to make this unnecessary. See the use_pango section
for example. The use of a naming rule can keep the gyp* file simpler.

All of these files if named with _udev.* would be excluded by the naming rule.
What do you think?

[Mostyn Bramley-Moore, 2013/11/18 23:32:26]

It might be a little confusing since there are other uses of udev in the chrome
layer, and these files don't end with _udev.*.  

Which reminds me of something from my old CL- this setting only affects the
content layer, should we rename it to something like content_use_udev?  I think
this is a reasonable distinction to make (ie disabling udev in content but not
in chrome).

+        'browser/device_monitor_udev.cc',
+        'browser/device_monitor_udev.h',
+        'browser/gamepad/gamepad_platform_data_fetcher_linux.cc',
+        'browser/udev_linux.cc',
+        'browser/udev_linux.h',
+      ],
+    }],
     ['OS=="linux" and use_aura==1', {
       'dependencies': [
         '../build/linux/system.gyp:dbus',