Add a test for crbug.com/1156334

Bug: 1156334
Change-Id: Ib5c7cc364391ab75a4394bc480f09dea9e76f8ad
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2583602
Auto-Submit: Andrey Kosyakov <caseq@chromium.org>
Commit-Queue: Peter Kvitek <kvitekp@chromium.org>
Reviewed-by: Peter Kvitek <kvitekp@chromium.org>
Cr-Commit-Position: refs/heads/master@{#835807}

third_party/blink/web_tests/inspector-protocol/protocol-passes-0x7f-expected.txt

+Tests that \0x7f passes through the protocol as is
+Got: "", 127 (length: 1)
+

third_party/blink/web_tests/inspector-protocol/protocol-passes-0x7f.js

+(async function(testRunner) {
+  testRunner.log('Tests that \\0x7f passes through the protocol as is');
+  const page = await testRunner.createPage();
+  const session = await page.createSession();
+  const str = await session.evaluate(`"\x7f"`);
+  testRunner.log(`Got: "${str}", ${str.charCodeAt(0)} (length: ${str.length})`);
+  testRunner.completeTest();
+})