ozone: Allow ozone evdev/kvm features to be enabled without running on ChromeOS.

base/sys_info.h

Index: base/sys_info.h
diff --git a/base/sys_info.h b/base/sys_info.h
index e35feff735e4ac3783d1870ae04d711ef7cdd7fc..07ed0aef74bd6548e9c29d70014e8401455700af 100644
--- a/base/sys_info.h
+++ b/base/sys_info.h
@@ -130,6 +130,10 @@ class BASE_EXPORT SysInfo {
   // Test method to force re-parsing of lsb-release.
   static void SetChromeOSVersionInfoForTest(const std::string& lsb_release,
                                             const Time& lsb_release_time);
+
+  // Returns true when running as system compositor. Ie. using libudev, kms and
+  // evdev for input and output.
+  static bool IsRunningAsSystemCompositor();

[rjkroege, 2017/01/02 01:26:27]

nitpicking that you can ignore: what you mean here is using ozone yes?

[reveman, 2017/01/02 07:11:32]

I'm expected that we'll keep having support for running ozone Chrome in a non
system compositor mode. E.g. the existing x11 and wayland platforms.

FYI, my initial version of this patch was explicitly checking "ozone_platform ==
gbm" but I decided that it was much easier and more useful to just separate this
into a flag. We can always improve the auto-detection logic for this in the
future.

 #endif  // defined(OS_CHROMEOS)
 
 #if defined(OS_ANDROID)