Move DeviceMonitorLinux to //device/core.

device/hid/device_monitor_linux.cc

Index: device/hid/device_monitor_linux.cc
diff --git a/device/hid/device_monitor_linux.cc b/device/hid/device_monitor_linux.cc
deleted file mode 100644
index 9c900228fd6c45da961f88dab99b45393bdb750e..0000000000000000000000000000000000000000
--- a/device/hid/device_monitor_linux.cc
+++ /dev/null
@@ -1,151 +0,0 @@
-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "device/hid/device_monitor_linux.h"
-
-#include <memory>
-
-#include "base/lazy_instance.h"
-#include "base/logging.h"
-#include "base/threading/thread_restrictions.h"
-#include "device/udev_linux/udev.h"
-
-namespace device {
-
-namespace {
-
-const char kUdevName[] = "udev";
-const char kUdevActionAdd[] = "add";
-const char kUdevActionRemove[] = "remove";
-
-// The instance will be reset when message loop destroys.
-base::LazyInstance<std::unique_ptr<DeviceMonitorLinux>>::Leaky
-    g_device_monitor_linux_ptr = LAZY_INSTANCE_INITIALIZER;
-
-}  // namespace
-
-DeviceMonitorLinux::DeviceMonitorLinux() : monitor_fd_(-1) {
-  base::ThreadRestrictions::AssertIOAllowed();
-  base::MessageLoop::current()->AddDestructionObserver(this);
-
-  udev_.reset(udev_new());
-  if (!udev_) {
-    LOG(ERROR) << "Failed to create udev.";
-    return;
-  }
-  monitor_.reset(udev_monitor_new_from_netlink(udev_.get(), kUdevName));
-  if (!monitor_) {
-    LOG(ERROR) << "Failed to create udev monitor.";
-    return;
-  }
-
-  int ret = udev_monitor_enable_receiving(monitor_.get());
-  if (ret != 0) {
-    LOG(ERROR) << "Failed to start udev monitoring.";
-    return;
-  }
-
-  monitor_fd_ = udev_monitor_get_fd(monitor_.get());
-  if (monitor_fd_ <= 0) {
-    LOG(ERROR) << "Failed to start udev monitoring.";
-    return;
-  }
-
-  if (!base::MessageLoopForIO::current()->WatchFileDescriptor(
-          monitor_fd_,
-          true,
-          base::MessageLoopForIO::WATCH_READ,
-          &monitor_watcher_,
-          this)) {
-    return;
-  }
-}
-
-// static
-DeviceMonitorLinux* DeviceMonitorLinux::GetInstance() {
-  if (!HasInstance())
-    g_device_monitor_linux_ptr.Get().reset(new DeviceMonitorLinux());
-  return g_device_monitor_linux_ptr.Get().get();
-}
-
-// static
-bool DeviceMonitorLinux::HasInstance() {
-  return g_device_monitor_linux_ptr.Get().get();
-}
-
-void DeviceMonitorLinux::AddObserver(Observer* observer) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (observer)
-    observers_.AddObserver(observer);
-}
-
-void DeviceMonitorLinux::RemoveObserver(Observer* observer) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (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()));
-
-  if (!enumerate) {
-    LOG(ERROR) << "Failed to enumerate devices.";
-    return;
-  }
-
-  if (udev_enumerate_scan_devices(enumerate.get()) != 0) {
-    LOG(ERROR) << "Failed to enumerate devices.";
-    return;
-  }
-
-  // This list is managed by |enumerate|.
-  udev_list_entry* devices = udev_enumerate_get_list_entry(enumerate.get());
-  for (udev_list_entry* i = devices; i != NULL;
-       i = udev_list_entry_get_next(i)) {
-    ScopedUdevDevicePtr device(
-        udev_device_new_from_syspath(udev_.get(), udev_list_entry_get_name(i)));
-    if (device)
-      callback.Run(device.get());
-  }
-}
-
-void DeviceMonitorLinux::WillDestroyCurrentMessageLoop() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  g_device_monitor_linux_ptr.Get().reset(NULL);
-}
-
-void DeviceMonitorLinux::OnFileCanReadWithoutBlocking(int fd) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK_EQ(monitor_fd_, fd);
-
-  ScopedUdevDevicePtr device(udev_monitor_receive_device(monitor_.get()));
-  if (!device)
-    return;
-
-  std::string action(udev_device_get_action(device.get()));
-  if (action == kUdevActionAdd)
-    FOR_EACH_OBSERVER(Observer, observers_, OnDeviceAdded(device.get()));
-  else if (action == kUdevActionRemove)
-    FOR_EACH_OBSERVER(Observer, observers_, OnDeviceRemoved(device.get()));
-}
-
-void DeviceMonitorLinux::OnFileCanWriteWithoutBlocking(int fd) {}
-
-DeviceMonitorLinux::~DeviceMonitorLinux() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  base::MessageLoop::current()->RemoveDestructionObserver(this);
-  monitor_watcher_.StopWatchingFileDescriptor();
-  close(monitor_fd_);
-}
-
-}  // namespace device