Revert of Replace libusb in the Linux/Chrome OS USB I/O path.

device/usb/BUILD.gn

Index: device/usb/BUILD.gn
diff --git a/device/usb/BUILD.gn b/device/usb/BUILD.gn
index db1545263bb1461da44a1740fcb233c6c722d660..0d3795bf291acf8e802ca5c58a0a7fb61eec4d0a 100644
--- a/device/usb/BUILD.gn
+++ b/device/usb/BUILD.gn
@@ -59,10 +59,6 @@
 
   if (is_android) {
     deps += [ ":jni_headers" ]
-    sources += [
-      "usb_device_handle_usbfs.cc",
-      "usb_device_handle_usbfs.h",
-    ]
   } else {
     sources += [
       "usb_context.cc",
@@ -78,17 +74,6 @@
     ]
 
     deps += [ "//third_party/libusb" ]
-  }
-
-  if (is_linux || is_chromeos) {
-    sources += [
-      "usb_device_handle_usbfs.cc",
-      "usb_device_handle_usbfs.h",
-    ]
-    sources -= [
-      "usb_device_handle_impl.cc",
-      "usb_device_handle_impl.h",
-    ]
   }
 
   if (is_chromeos) {