[DevTools] New harness for inspector-protocol layout tests

third_party/WebKit/LayoutTests/inspector-protocol/cpu-profiler/enable-disable.js

+(async function(testRunner) {
+  let {page, session, dp} = await testRunner.startBlank(
+      'Test that profiling can only be started when Profiler was enabled and that ' +
+      'Profiler.disable command will stop recording all profiles.');
+
+  var allowConsoleProfiles = false;
+  dp.Profiler.onConsoleProfileStarted(messageObject => {
+    if (allowConsoleProfiles)
+      testRunner.log('PASS: console initiated profile started')
+    else
+      testRunner.log('FAIL: console profile started ' + JSON.stringify(messageObject, null, 4));
+  });
+  dp.Profiler.onConsoleProfileFinished(messageObject => {
+    if (allowConsoleProfiles)
+      testRunner.log('PASS: console initiated profile received')
+    else
+      testRunner.log('FAIL: unexpected profile received ' + JSON.stringify(messageObject, null, 4));
+  });
+
+  var messageObject = await dp.Profiler.start();
+  if (!testRunner.expectedError('didFailToStartWhenDisabled', messageObject))
+    return;
+
+  allowConsoleProfiles = true;
+  dp.Profiler.enable();
+  messageObject = await dp.Profiler.start();
+  if (!testRunner.expectedSuccess('didStartFrontendProfile', messageObject))
+    return;
+
+  messageObject = await dp.Runtime.evaluate({expression: 'console.profile("p1");'});
+  if (!testRunner.expectedSuccess('didStartConsoleProfile', messageObject))
+    return;
+
+  messageObject = await dp.Profiler.disable();
+  if (!testRunner.expectedSuccess('didDisableProfiler', messageObject))
+    return;
+
+  dp.Profiler.enable();
+  messageObject = await dp.Profiler.stop();
+  if (!testRunner.expectedError('no front-end initiated profiles found', messageObject))
+    return;
+  allowConsoleProfiles = false;
+
+  messageObject = await dp.Runtime.evaluate({expression: 'console.profileEnd();'});
+  if (!testRunner.expectedSuccess('didStopConsoleProfile', messageObject))
+    return;
+  testRunner.completeTest();
+})