Move UsbService to its own component.

components/usb_service/usb_service.cc

Index: components/usb_service/usb_service.cc
diff --git a/chrome/browser/usb/usb_service.cc b/components/usb_service/usb_service.cc
similarity index 95%
rename from chrome/browser/usb/usb_service.cc
rename to components/usb_service/usb_service.cc
index 591645743866e7113d937430a5fa4e69d43847e3..318caa189e802bad828bcbe802db81f7637e535a 100644
--- a/chrome/browser/usb/usb_service.cc
+++ b/components/usb_service/usb_service.cc
@@ -2,18 +2,20 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#include "chrome/browser/usb/usb_service.h"
+#include "components/usb_service/usb_service.h"
 
 #include <set>
 #include <vector>
 
 #include "base/lazy_instance.h"
 #include "base/stl_util.h"
-#include "chrome/browser/usb/usb_context.h"
-#include "chrome/browser/usb/usb_device.h"
+#include "components/usb_service/usb_context.h"
+#include "components/usb_service/usb_device.h"
 #include "content/public/browser/browser_thread.h"
 #include "third_party/libusb/src/libusb/libusb.h"
 
+namespace usb_service {
+
 namespace {
 
 base::LazyInstance<scoped_ptr<UsbService> >::Leaky g_usb_service_instance =
@@ -120,3 +122,5 @@ void UsbService::RefreshDevices() {
 
   libusb_free_device_list(platform_devices, true);
 }
+
+}  // namespace usb_service