Add FilePath to base namespace.

chrome/browser/system_monitor/udev_util_linux.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_SYSTEM_MONITOR_UDEV_UTIL_LINUX_H_
 #define CHROME_BROWSER_SYSTEM_MONITOR_UDEV_UTIL_LINUX_H_
 
 #include <libudev.h>
 
 #include <string>
 
 #include "base/memory/scoped_generic_obj.h"
 
+namespace base {
 class FilePath;
+}
 
 namespace chrome {
 
 // ScopedGenericObj functor for UdevObjectRelease().
 class ScopedReleaseUdevObject {
  public:
   void operator()(struct udev* udev) const {
     udev_unref(udev);
   }
 };
@@ skipping 10 matching lines @@
 typedef ScopedGenericObj<struct udev_device*,
                          ScopedReleaseUdevDeviceObject> ScopedUdevDeviceObject;
 
 // Wrapper function for udev_device_get_property_value() that also checks for
 // valid but empty values.
 std::string GetUdevDevicePropertyValue(struct udev_device* udev_device,
                                        const char* key);
 
 // Helper for udev_device_new_from_syspath()/udev_device_get_property_value()
 // pair. |device_path| is the absolute path to the device, including /sys.
-bool GetUdevDevicePropertyValueByPath(const FilePath& device_path,
+bool GetUdevDevicePropertyValueByPath(const base::FilePath& device_path,
                                       const char* key,
                                       std::string* result);
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_SYSTEM_MONITOR_UDEV_UTIL_LINUX_H_