Move all event related devices from ui/events/ to ui/events/devices/

ui/events/device_util_linux.cc

-// 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 "ui/events/device_util_linux.h"
-
-#include <string>
-
-#include "base/files/file_enumerator.h"
-#include "base/files/file_path.h"
-#include "base/strings/string_util.h"
-
-namespace ui {
-
-bool IsTouchscreenInternal(const base::FilePath& path) {
-  std::string event_node = path.BaseName().value();
-  if (event_node.empty() || !StartsWithASCII(event_node, "event", false))
-    return false;
-
-  // Extract id "XXX" from "eventXXX"
-  std::string event_node_id = event_node.substr(5);
-
-  // I2C input device registers its dev input node at
-  // /sys/bus/i2c/devices/*/input/inputXXX/eventXXX
-  base::FileEnumerator i2c_enum(
-      base::FilePath(FILE_PATH_LITERAL("/sys/bus/i2c/devices/")),
-      false,
-      base::FileEnumerator::DIRECTORIES);
-  for (base::FilePath i2c_name = i2c_enum.Next(); !i2c_name.empty();
-       i2c_name = i2c_enum.Next()) {
-    base::FileEnumerator input_enum(
-        i2c_name.Append(FILE_PATH_LITERAL("input")),
-        false,
-        base::FileEnumerator::DIRECTORIES,
-        FILE_PATH_LITERAL("input*"));
-    for (base::FilePath input = input_enum.Next(); !input.empty();
-         input = input_enum.Next()) {
-      if (input.BaseName().value().substr(5) == event_node_id)
-        return true;
-    }
-  }
-
-  return false;
-}
-
-}  // namespace