Replace libusb in the Linux/Chrome OS USB I/O path.

device/usb/usb_device_impl.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef DEVICE_USB_USB_DEVICE_IMPL_H_
 #define DEVICE_USB_USB_DEVICE_IMPL_H_
 
 #include <stdint.h>
 
 #include <list>
 #include <string>
 #include <utility>
 
 #include "base/callback.h"
+#include "base/files/scoped_file.h"
 #include "base/macros.h"
 #include "base/threading/thread_checker.h"
 #include "build/build_config.h"
 #include "device/usb/usb_descriptors.h"
 #include "device/usb/usb_device.h"
 #include "device/usb/webusb_descriptors.h"
 
 struct libusb_device;
 struct libusb_device_descriptor;
 struct libusb_device_handle;
@@ skipping 41 matching lines @@
       scoped_ptr<WebUsbAllowedOrigins> allowed_origins) {
     webusb_allowed_origins_ = std::move(allowed_origins);
   }
   void set_webusb_landing_page(const GURL& url) { webusb_landing_page_ = url; }
 
   PlatformUsbDevice platform_device() const { return platform_device_; }
 
  protected:
   friend class UsbServiceImpl;
   friend class UsbDeviceHandleImpl;
+  friend class UsbDeviceHandleUsbfs;
 
   // Called by UsbServiceImpl only;
   UsbDeviceImpl(scoped_refptr<UsbContext> context,
                 PlatformUsbDevice platform_device,
                 const libusb_device_descriptor& descriptor,
                 scoped_refptr<base::SequencedTaskRunner> blocking_task_runner);
 
   ~UsbDeviceImpl() override;
 
   // Called only by UsbServiceImpl.
   void set_visited(bool visited) { visited_ = visited; }
   bool was_visited() const { return visited_; }
   void OnDisconnect();
   void ReadAllConfigurations();
 
   // Called by UsbDeviceHandleImpl.
-  void HandleClosed(scoped_refptr<UsbDeviceHandle> handle);
+  void HandleClosed(UsbDeviceHandle* handle);
+  void ActiveConfigurationChanged(int configuration_value);
   void RefreshActiveConfiguration();
 
  private:
   void GetAllConfigurations();
 #if defined(OS_CHROMEOS)
   void OnOpenRequestComplete(const OpenCallback& callback,
                              dbus::FileDescriptor fd);
   void OnOpenRequestError(const OpenCallback& callback,
                           const std::string& error_name,
                           const std::string& error_message);
   void OpenOnBlockingThreadWithFd(dbus::FileDescriptor fd,
                                   const OpenCallback& callback);
-#endif
+#else
   void OpenOnBlockingThread(const OpenCallback& callback);
+#endif  // defined(OS_CHROMEOS)
+#if defined(OS_LINUX)
+  void Opened(base::ScopedFD fd, const OpenCallback& callback);
+#else
   void Opened(PlatformUsbDeviceHandle platform_handle,
               const OpenCallback& callback);
+#endif  // defined(OS_LINUX)
 
   base::ThreadChecker thread_checker_;
   PlatformUsbDevice platform_device_;
   bool visited_ = false;
 
   // On Chrome OS device path is necessary to request access from the permission
   // broker.
   std::string device_path_;
 
   // The current device configuration descriptor. May be null if the device is
   // in an unconfigured state; if not null, it is a pointer to one of the
   // items at UsbDevice::configurations_.
   const UsbConfigDescriptor* active_configuration_ = nullptr;
 
   // Retain the context so that it will not be released before UsbDevice.
   scoped_refptr<UsbContext> context_;
 
   // Opened handles.
   std::list<UsbDeviceHandle*> handles_;
 
   scoped_refptr<base::SequencedTaskRunner> task_runner_;
   scoped_refptr<base::SequencedTaskRunner> blocking_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(UsbDeviceImpl);
 };
 
 }  // namespace device
 
 #endif  // DEVICE_USB_USB_DEVICE_IMPL_H_