URLPattern: Throw on more illegal hostname code points.

As discussed in the mozilla standards-position issue on URLPattern:

mozilla/standards-positions#566

There are a number of URL encoding interop issues between browsers.
Since URLPattern delegates to the URL parser for canonicalization it
is also exposed to these interop issues.

While fixing all of URL's interop issues is orthogonal to shipping
URLPattern, we can at least prevent clearly illegal code points from
being used in URLPattern.  This will avoid increasing usage of these
code points which will in turn make it slightly easier to fix the issue
in the URL parser in the future.

Bug: 1248061
Change-Id: I58a55e4206004a6cba727f19d537c5929ce16d43

urlpattern/resources/urlpatterntestdata.json

@@ -2359,5 +2359,73 @@
     "expected_match": {
       "protocol": { "input": "foobar", "groups": { "name": "foobar" }}
     }
+  },
+  {
+    "pattern": [{ "hostname": "bad hostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad#hostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad%hostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad/hostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad\\:hostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad<hostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad>hostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad?hostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad@hostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad[hostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad]hostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad\\\\hostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad^hostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad|hostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad\nhostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad\rhostname" }],
+    "expected_obj": "error"
+  },
+  {
+    "pattern": [{ "hostname": "bad\thostname" }],
+    "expected_obj": "error"
   }
 ]