ozone: evdev: Convert CHECKs to DCHECKs per style guide

ui/events/ozone/evdev/event_factory_evdev.cc

Index: ui/events/ozone/evdev/event_factory_evdev.cc
diff --git a/ui/events/ozone/evdev/event_factory_evdev.cc b/ui/events/ozone/evdev/event_factory_evdev.cc
index d3ba4ba1d03b447c5e663b6e9fefdccb369c5957..7dc288fc76554faced493aace085ca541eea1f16 100644
--- a/ui/events/ozone/evdev/event_factory_evdev.cc
+++ b/ui/events/ozone/evdev/event_factory_evdev.cc
@@ -140,7 +140,7 @@ EventFactoryEvdev::EventFactoryEvdev(
           base::Bind(base::IgnoreResult(&EventFactoryEvdev::DispatchUiEvent),
                      base::Unretained(this))),
       weak_ptr_factory_(this) {
-  CHECK(device_manager_);
+  DCHECK(device_manager_);
 }
 
 EventFactoryEvdev::~EventFactoryEvdev() { STLDeleteValues(&converters_); }
@@ -153,7 +153,7 @@ void EventFactoryEvdev::AttachInputDevice(
     const base::FilePath& path,
     scoped_ptr<EventConverterEvdev> converter) {
   TRACE_EVENT1("ozone", "AttachInputDevice", "path", path.value());
-  CHECK(ui_task_runner_->RunsTasksOnCurrentThread());
+  DCHECK(ui_task_runner_->RunsTasksOnCurrentThread());
 
   // If we have an existing device, detach it. We don't want two
   // devices with the same name open at the same time.
@@ -208,7 +208,7 @@ void EventFactoryEvdev::OnDispatcherListChanged() {
 
 void EventFactoryEvdev::DetachInputDevice(const base::FilePath& path) {
   TRACE_EVENT1("ozone", "DetachInputDevice", "path", path.value());
-  CHECK(ui_task_runner_->RunsTasksOnCurrentThread());
+  DCHECK(ui_task_runner_->RunsTasksOnCurrentThread());
 
   // Remove device from map.
   scoped_ptr<EventConverterEvdev> converter(converters_[path]);