evdev: Support device hotplug with udev

ui/events/ozone/evdev/event_device_info.cc

Index: ui/events/ozone/evdev/event_device_info.cc
diff --git a/ui/events/ozone/evdev/event_device_info.cc b/ui/events/ozone/evdev/event_device_info.cc
index 9621646d26b9b22445d58d43ceadc1e50afb634a..3e10d793a6b9aa6e80fcc5a0166fad7cb50f6cb3 100644
--- a/ui/events/ozone/evdev/event_device_info.cc
+++ b/ui/events/ozone/evdev/event_device_info.cc
@@ -14,8 +14,6 @@ namespace ui {
 namespace {
 
 bool GetEventBits(int fd, unsigned int type, void* buf, unsigned int size) {
-  base::ThreadRestrictions::AssertIOAllowed();

[rjkroege, 2014/01/30 22:18:09]

for ozone, it would be really nice to have a "only io for events is allowed on
the ui thread" instead of "all I/O is allowed in here"  what do you think?

[spang, 2014/01/31 17:33:00]

Should that go in base::ThreadRestrictions?

I think that sounds like a separate change ;)

-
   if (ioctl(fd, EVIOCGBIT(type, size), buf) < 0) {
     DLOG(ERROR) << "failed EVIOCGBIT(" << type << ", " << size << ") on fd "
                 << fd;
@@ -26,8 +24,6 @@ bool GetEventBits(int fd, unsigned int type, void* buf, unsigned int size) {
 }
 
 bool GetPropBits(int fd, void* buf, unsigned int size) {
-  base::ThreadRestrictions::AssertIOAllowed();
-
   if (ioctl(fd, EVIOCGPROP(size), buf) < 0) {
     DLOG(ERROR) << "failed EVIOCGPROP(" << size << ") on fd " << fd;
     return false;