Add a manifest property declaring USB printers supported by an app.

extensions/test/data/manifest_tests/usb_printers_invalid_filter.json

Index: extensions/test/data/manifest_tests/usb_printers_invalid_filter.json
diff --git a/extensions/test/data/manifest_tests/usb_printers_invalid_filter.json b/extensions/test/data/manifest_tests/usb_printers_invalid_filter.json
new file mode 100644
index 0000000000000000000000000000000000000000..e11777950f51bf8e8679834a168a4d00e736c410
--- /dev/null
+++ b/extensions/test/data/manifest_tests/usb_printers_invalid_filter.json
@@ -0,0 +1,16 @@
+{
+  "name": "extensions_unittests --gtest_filter=UsbPrinterManifestTest.InvalidFilter",
+  "version": "1",
+  "manifest_version": 2,
+  "app": {
+    "background": {
+      "scripts": ["background.js"]
+    }
+  },
+  "usb_printers": {
+    "filters": [
+      // Cannot specify both productId and interfaceClass.
+      { "vendorId": 0, "productId": 0, "interfaceClass": 0 }
+    ]
+  }
+}