Add browser tests for USB device add/remove events.

extensions/test/data/api_test/usb/remove_event/manifest.json

Index: extensions/test/data/api_test/usb/remove_event/manifest.json
diff --git a/extensions/test/data/api_test/hid/remove_event/manifest.json b/extensions/test/data/api_test/usb/remove_event/manifest.json
similarity index 53%
copy from extensions/test/data/api_test/hid/remove_event/manifest.json
copy to extensions/test/data/api_test/usb/remove_event/manifest.json
index 22da39f159582137878b1393cd6189bb421f681c..2dce9e8a27e6a8c7450c9054502367b1ac7270b7 100644
--- a/extensions/test/data/api_test/hid/remove_event/manifest.json
+++ b/extensions/test/data/api_test/usb/remove_event/manifest.json
@@ -1,15 +1,15 @@
 {
-  "name": "chrome.hid.onDeviceRemoved",
+  "name": "chrome.usb.onDeviceRemoved",
   "version": "0.1",
-  "description": "browser test for chrome.hid.onDeviceRemoved event",
+  "description": "browser test for chrome.usb.onDeviceRemoved event",
   "app": {
     "background": {
       "scripts": ["background.js"]
     }
   },
   "permissions": [
-    "hid",
+    "usb",
     // This is a test device emulated by the mocks enabled for the test.
-    { "usbDevices": [{ "vendorId": 6353, "productId": 22768 }]}
+    { "usbDevices": [{ "vendorId": 0, "productId": 0 }]}
   ]
 }