[DevTools] New harness for inspector-protocol layout tests

third_party/WebKit/LayoutTests/inspector-protocol/page/createIsolatedWorld.js

+(async function(testRunner) {
+  let {page, session, dp} = await testRunner.startBlank('');
+
+  await dp.Runtime.enable();
+  testRunner.log('Runtime enabled');
+
+  await dp.Page.enable();
+  testRunner.log('Page enabled');
+
+  var response = await dp.Page.getResourceTree();
+  var mainFrameId = response.result.frameTree.frame.id;
+  testRunner.log('Main Frame obtained');
+
+  dp.Page.createIsolatedWorld({frameId: mainFrameId, worldName: 'Test world'});
+  dp.Runtime.onExecutionContextCreated(message => {
+    if (message.params.context.auxData.frameId !== mainFrameId)
+      return;
+    if (message.params.context.auxData.isDefault === false && message.params.context.name === 'Test world') {
+      testRunner.log('PASS - isolated world created.');
+    } else {
+      testRunner.log('fail - main world created.');
+      testRunner.log(JSON.stringify(message.params));
+    }
+    testRunner.completeTest();
+  });
+})