Experimental USB API implementation.

chrome/browser/extensions/api/api_resource_controller.cc

Index: chrome/browser/extensions/api/api_resource_controller.cc
diff --git a/chrome/browser/extensions/api/api_resource_controller.cc b/chrome/browser/extensions/api/api_resource_controller.cc
index b1014296cfe3592373da33f48cbd37a4c5dd028d..28d7e7443ed8694973af3429f96c0a2e3a9dac6d 100644
--- a/chrome/browser/extensions/api/api_resource_controller.cc
+++ b/chrome/browser/extensions/api/api_resource_controller.cc
@@ -5,6 +5,7 @@
 #include "chrome/browser/extensions/api/api_resource_controller.h"
 #include "chrome/browser/extensions/api/serial/serial_connection.h"
 #include "chrome/browser/extensions/api/socket/socket.h"
+#include "chrome/browser/extensions/api/usb/usb_device_resource.h"
 
 namespace extensions {
 
@@ -79,4 +80,10 @@ SerialConnection* APIResourceController::GetSerialConnection(
       GetAPIResource(APIResource::SerialConnectionResource, api_resource_id));
 }
 
+UsbDeviceResource* APIResourceController::GetUsbDeviceResource(
+    int api_resource_id) const {
+  return static_cast<UsbDeviceResource*>(GetAPIResource(
+      APIResource::UsbDeviceResource, api_resource_id));
+}
+
 }  // namespace extensions