WebUSB: Remove guid property from USBDevice.

third_party/WebKit/LayoutTests/usb/resources/usb-helpers.js

Index: third_party/WebKit/LayoutTests/usb/resources/usb-helpers.js
diff --git a/third_party/WebKit/LayoutTests/usb/resources/usb-helpers.js b/third_party/WebKit/LayoutTests/usb/resources/usb-helpers.js
index 3a91fd5448791b8894aa56811b0a621d636df762..dcafa8d74e12b7e5fac79cbf9fd8060e38eea2ea 100644
--- a/third_party/WebKit/LayoutTests/usb/resources/usb-helpers.js
+++ b/third_party/WebKit/LayoutTests/usb/resources/usb-helpers.js
@@ -41,7 +41,6 @@ function usbMocks(mojo) {
     'device/usb/public/interfaces/device.mojom',
   ], (bindings, connection, chooserService, deviceManager, device) => {
     function assertDeviceInfoEquals(device, info) {
-      assert_equals(device.guid, info.guid);
       assert_equals(device.usbVersionMajor, info.usb_version_major);
       assert_equals(device.usbVersionMinor, info.usb_version_minor);
       assert_equals(device.usbVersionSubminor, info.usb_version_subminor);
@@ -339,6 +338,7 @@ function usbMocks(mojo) {
         this.mockDevices_.forEach(device => {
           for (var stub of device.stubs)
             bindings.StubBindings(stub).close();
+          this.client_.onDeviceRemoved(device.info);
         });
         this.mockDevices_.clear();
       }