Adding use_system_libusb option for third_party/libusb

chrome/browser/usb/usb_service.cc

Index: chrome/browser/usb/usb_service.cc
diff --git a/chrome/browser/usb/usb_service.cc b/chrome/browser/usb/usb_service.cc
index ad172d88508b2ac06070b809a34f40d7d85ae25f..c69c40c35df50902a2a9456b5c5a697105e6afb4 100644
--- a/chrome/browser/usb/usb_service.cc
+++ b/chrome/browser/usb/usb_service.cc
@@ -8,7 +8,7 @@
 #include "base/bind_helpers.h"
 #include "base/stl_util.h"
 #include "chrome/browser/usb/usb_device.h"
-#include "third_party/libusb/libusb/libusb.h"
+#include "third_party/libusb/libusb.h"
 
 UsbService::UsbService() : running_(true), thread_("UsbThread") {
   libusb_init(&context_);
@@ -75,7 +75,7 @@ void UsbService::PostHandleEventTask() {
 }
 
 void UsbService::HandleEvent() {
-  libusb_handle_events_completed(context_, NULL);
+  libusb_handle_events(context_);
   if (running_) {
     PostHandleEventTask();
   }