[DevTools] New harness for inspector-protocol layout tests

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

Index: third_party/WebKit/LayoutTests/inspector-protocol/page/frameScheduledNavigation.js
diff --git a/third_party/WebKit/LayoutTests/inspector-protocol/page/frameScheduledNavigation.js b/third_party/WebKit/LayoutTests/inspector-protocol/page/frameScheduledNavigation.js
new file mode 100644
index 0000000000000000000000000000000000000000..ce7b7b2a971a44d27695f70091ef127a2471aac6
--- /dev/null
+++ b/third_party/WebKit/LayoutTests/inspector-protocol/page/frameScheduledNavigation.js
@@ -0,0 +1,21 @@
+(async function(testRunner) {
+  let {page, session, dp} = await testRunner.startBlank('');
+
+  dp.Page.enable();
+  session.evaluate(`
+    var frame = document.createElement('iframe');
+    document.body.appendChild(frame);
+    frame.src = '${testRunner.url('../resources/blank.html')}';
+  `);
+
+  var msg = await dp.Page.onceFrameScheduledNavigation();
+  testRunner.log('Scheduled navigation with delay ' + msg.params.delay);
+
+  await dp.Page.onceFrameStartedLoading();
+  // This event should be received before the scheduled navigation is cleared.
+  testRunner.log('Started loading');
+
+  await dp.Page.onceFrameClearedScheduledNavigation();
+  testRunner.log('Cleared scheduled navigation');
+  testRunner.completeTest();
+})