Remove unused function DeviceMonitorLinux::GetDeviceFromPath.

device/base/device_monitor_linux.cc

Index: device/base/device_monitor_linux.cc
diff --git a/device/base/device_monitor_linux.cc b/device/base/device_monitor_linux.cc
index cc64870b8cf17392507039756fe43eeef33af6ca..2bc8c09a23f2a69807827cee0888a800b6600af4 100644
--- a/device/base/device_monitor_linux.cc
+++ b/device/base/device_monitor_linux.cc
@@ -5,6 +5,7 @@
 #include "device/base/device_monitor_linux.h"
 
 #include <memory>
+#include <string>
 
 #include "base/bind.h"
 #include "base/lazy_instance.h"
@@ -76,14 +77,6 @@ void DeviceMonitorLinux::RemoveObserver(Observer* observer) {
   observers_.RemoveObserver(observer);
 }
 
-ScopedUdevDevicePtr DeviceMonitorLinux::GetDeviceFromPath(
-    const std::string& path) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  ScopedUdevDevicePtr device(
-      udev_device_new_from_syspath(udev_.get(), path.c_str()));
-  return device;
-}
-
 void DeviceMonitorLinux::Enumerate(const EnumerateCallback& callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
   ScopedUdevEnumeratePtr enumerate(udev_enumerate_new(udev_.get()));