Add support for sending a USB SET_CONFIGURATION request.

extensions/browser/api/usb/usb_api.h

Index: extensions/browser/api/usb/usb_api.h
diff --git a/extensions/browser/api/usb/usb_api.h b/extensions/browser/api/usb/usb_api.h
index 9310f60e72453c970cba1375fb525454dd4c25bd..8903348a3ba06b38c5c608a0d20b0d9b1b70515f 100644
--- a/extensions/browser/api/usb/usb_api.h
+++ b/extensions/browser/api/usb/usb_api.h
@@ -169,6 +169,23 @@ class UsbOpenDeviceFunction : public UsbAsyncApiFunction {
   scoped_ptr<extensions::core_api::usb::OpenDevice::Params> parameters_;
 };
 
+class UsbSetConfigurationFunction : public UsbAsyncApiFunction {
+ public:
+  DECLARE_EXTENSION_FUNCTION("usb.setConfiguration", USB_SETCONFIGURATION)
+
+  UsbSetConfigurationFunction();
+
+ protected:
+  ~UsbSetConfigurationFunction() override;
+
+  // AsyncApiFunction:
+  bool Prepare() override;
+  void AsyncWorkStart() override;
+
+ private:
+  scoped_ptr<extensions::core_api::usb::SetConfiguration::Params> parameters_;
+};
+
 class UsbGetConfigurationFunction : public UsbAsyncApiFunction {
  public:
   DECLARE_EXTENSION_FUNCTION("usb.getConfiguration", USB_GETCONFIGURATION)