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 0d3795bf291acf8e802ca5c58a0a7fb61eec4d0a..db1545263bb1461da44a1740fcb233c6c722d660 100644
--- a/device/usb/BUILD.gn
+++ b/device/usb/BUILD.gn
@@ -59,6 +59,10 @@ source_set("usb") {
 
   if (is_android) {
     deps += [ ":jni_headers" ]
+    sources += [
+      "usb_device_handle_usbfs.cc",
+      "usb_device_handle_usbfs.h",
+    ]
   } else {
     sources += [
       "usb_context.cc",
@@ -76,6 +80,17 @@ source_set("usb") {
     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) {
     deps += [
       "//chromeos",