[DevTools] Migrate inspector-protocol/animation tests to new harness

third_party/WebKit/LayoutTests/inspector-protocol/animation/animation-start-cancel.js

+(async function(testRunner) {
+  let {page, session, dp} = await testRunner.startHTML(`
+    <div id='node' style='background-color: red; width: 100px'></div>
+  `, '');
+
+  dp.Animation.onAnimationCreated(() => testRunner.log('Animation created'));
+  dp.Animation.onAnimationStarted(() => testRunner.log('Animation started'));
+  dp.Animation.onAnimationCanceled(() => {
+    testRunner.log('Animation canceled')
+    testRunner.completeTest();
+  });
+  dp.Animation.enable();
+
+  session.evaluate(`
+    node.style.transition = '1s';
+    node.offsetTop;
+    node.style.width = '200px';
+    node.offsetTop;
+    // Deliberately delay for two RAFs, which causes the animation to start
+    // before we cancel it by clearing the transition.
+    window.requestAnimationFrame(function() {
+      window.requestAnimationFrame(function() {
+        node.style.transition = '';
+      });
+    });
+  `);
+})