Add web_tests/inspector-protocol/string-as-object.js

Bug: 1154370
Change-Id: I186be83eb5b63870a435821b6d03134bfed4a9cd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2625751
Auto-Submit: Andrey Kosyakov <caseq@chromium.org>
Reviewed-by: Simon Zünd <szuend@chromium.org>
Commit-Queue: Andrey Kosyakov <caseq@chromium.org>
Cr-Commit-Position: refs/heads/master@{#843751}

third_party/blink/web_tests/inspector-protocol/string-as-object-expected.txt

+Tests that passing a string intestead of a protocol object does not crash crash backend (crbug.com/1154370)
+Error: {
+    error : {
+        code : -32602
+        data : Failed to deserialize params.headers - BINDINGS: dictionary value expected <somewhere>
+        message : Invalid parameters
+    }
+    id : <number>
+    sessionId : <string>
+}
+

third_party/blink/web_tests/inspector-protocol/string-as-object.js

+(async function(testRunner) {
+  const {dp} = await testRunner.startBlank(
+      `Tests that passing a string intestead of a protocol object does not crash crash backend (crbug.com/1154370)`);
+
+  const response = await dp.Network.setExtraHTTPHeaders({headers: 'a string'});
+  if (response.error && response.error.data)
+    response.error.data = _trimErrorMessage(response.error.data);
+  testRunner.log(response, `Error: `);
+  testRunner.completeTest();
+
+  function _trimErrorMessage(error) {
+    return error.replace(/at position \d+/, "<somewhere>");
+  }
+})