[DevTools] New harness for inspector-protocol layout tests

third_party/WebKit/LayoutTests/inspector-protocol/animation/animation-resolve.js

+(async function(testRunner) {
+  let {page, session, dp} = await testRunner.startHTML(`
+    <div id='node' style='background-color: red; height: 100px'></div>
+  `, '');
+
+  dp.Animation.enable();
+  session.evaluate(`
+    window.player = node.animate([{ width: '100px' }, { width: '200px' }], 2000);
+  `);
+
+  var result = await dp.Animation.onceAnimationStarted();
+  testRunner.log('Animation started');
+  var response = await dp.Animation.resolveAnimation({ animationId: result.params.animation.id });
+  testRunner.log('Remote object:');
+  testRunner.log(response.result.remoteObject.className);
+  testRunner.completeTest();
+})