Check USB device path access when prompting users to select a device.

device/usb/usb_device_impl.h

Index: device/usb/usb_device_impl.h
diff --git a/device/usb/usb_device_impl.h b/device/usb/usb_device_impl.h
index 702b20e6f06e926e463c6e242de771ba4f5bd36f..897b4910fe045d33e37bdf4c3df97057ebc9d7a1 100644
--- a/device/usb/usb_device_impl.h
+++ b/device/usb/usb_device_impl.h
@@ -32,9 +32,10 @@ class UsbDeviceImpl : public UsbDevice {
  public:
 // UsbDevice implementation:
 #if defined(OS_CHROMEOS)
-  void RequestUsbAccess(
-      int interface_id,
-      const base::Callback<void(bool success)>& callback) override;
+  // Only overridden on Chrome OS.
+  void CheckUsbAccess(const ResultCallback& callback) override;
+  void RequestUsbAccess(int interface_id,
+                        const ResultCallback& callback) override;
 #endif  // OS_CHROMEOS
   scoped_refptr<UsbDeviceHandle> Open() override;
   bool Close(scoped_refptr<UsbDeviceHandle> handle) override;