Get all the UsbConfigDescriptor for the device configuration

chrome/browser/chromeos/printer_detector/printer_detector_unittest.cc

Index: chrome/browser/chromeos/printer_detector/printer_detector_unittest.cc
diff --git a/chrome/browser/chromeos/printer_detector/printer_detector_unittest.cc b/chrome/browser/chromeos/printer_detector/printer_detector_unittest.cc
index d63d6e35e372b92d4c428e5e4adac933d32bc8ed..b462e92727da9563d7e6bf3042e6f920753b020a 100644
--- a/chrome/browser/chromeos/printer_detector/printer_detector_unittest.cc
+++ b/chrome/browser/chromeos/printer_detector/printer_detector_unittest.cc
@@ -73,11 +73,17 @@ class FakeUsbDevice : public device::UsbDevice {
     return false;
   }
 
-  const device::UsbConfigDescriptor* GetConfiguration() override {
+  const device::UsbConfigDescriptor* GetCurrentConfiguration() override {
     return config_.get();
   }
 
+  const std::vector<device::UsbConfigDescriptor>& configurations()
+      const override {
+    return configurations_;
+  }
+
   scoped_ptr<device::UsbConfigDescriptor> config_;
+  std::vector<device::UsbConfigDescriptor> configurations_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeUsbDevice);
 };