Remove PlatformFile from device/hid

BUG=322664
R=rockot@chromium.org

Review URL: https://codereview.chromium.org/173003002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@252479 0039d316-1c4b-4281-b951-d872f2087c98
SVN changes up to revision 252479