BulkPrintersCalculator: Entry with an incorrect uri in the unittest

This patch extends the unittest by adding an entry with incorrect uri.
I was not able to reproduce the bug described in the issue.

BUG=chromium:1015916
TEST=on my workstation by running unit_tests

Change-Id: I989fc9d82956f16b277648ec942de454763fadd2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1912695
Auto-Submit: Piotr Pawliczek <pawliczek@chromium.org>
Reviewed-by: Sean Kau <skau@chromium.org>
Commit-Queue: Piotr Pawliczek <pawliczek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#718382}

chrome/browser/chromeos/printing/bulk_printers_calculator_unittest.cc

@@ -16,7 +16,7 @@
 namespace chromeos {
 namespace {
 
-// The number of printers in BulkPolicyContentsJson.
+// The number of correct printers in BulkPolicyContentsJson.
 constexpr size_t kNumPrinters = 3;
 
 // An example bulk printer configuration file.
@@ -32,6 +32,18 @@ constexpr char kBulkPolicyContentsJson[] = R"json(
     "ppd_resource": {
       "effective_model": "MS610de"
     }
+  }, {
+    "id": "Incorrect uri",
+    "display_name": "aaa",
+    "description": "bbbb",
+    "manufacturer": "cccc",
+    "model":"dddd",
+    "uri":"ipp://:",
+    "uuid":"1c555fdb-1193-2204-3346-44c046e79d12",
+    "ppd_resource":{
+      "effective_manufacturer": "eee",
+      "effective_model": "fff"
+    }
   }, {
     "id": "Second",
     "display_name": "Color Laser",