Gate devtools tests

Following precedence in console-test.

Author: sebmarkbage

packages/react-devtools-shared/src/__tests__/TimelineProfiler-test.js

@@ -18,6 +18,11 @@ import {
 import {ReactVersion} from '../../../../ReactVersions';
 import semver from 'semver';
 
+let React = require('react');
+let Scheduler;
+let store;
+let utils;
+
 // TODO: This is how other DevTools tests access the version but we should find
 // a better solution for this
 const ReactVersionTestingAgainst = process.env.REACT_VERSION || ReactVersion;
@@ -26,11 +31,16 @@ const ReactVersionTestingAgainst = process.env.REACT_VERSION || ReactVersion;
 const enableSiblingPrerendering =
   false && semver.gte(ReactVersionTestingAgainst, '19.0.0');
 
+// This flag is on experimental which disables timeline profiler.
+const enableComponentPerformanceTrack =
+  React.version.startsWith('19') && React.version.includes('experimental');
+
 describe('Timeline profiler', () => {
-  let React;
-  let Scheduler;
-  let store;
-  let utils;
+  if (enableComponentPerformanceTrack) {
+    test('no tests', () => {});
+    // Ignore all tests.
+    return;
+  }
 
   beforeEach(() => {
     utils = require('./utils');

packages/react-devtools-shared/src/__tests__/preprocessData-test.js

@@ -16,16 +16,29 @@ import {ReactVersion} from '../../../../ReactVersions';
 
 const ReactVersionTestingAgainst = process.env.REACT_VERSION || ReactVersion;
 
+let React = require('react');
+let ReactDOM;
+let ReactDOMClient;
+let Scheduler;
+let utils;
+let assertLog;
+let waitFor;
+
+// This flag is on experimental which disables timeline profiler.
+const enableComponentPerformanceTrack =
+  React.version.startsWith('19') && React.version.includes('experimental');
+
 describe('Timeline profiler', () => {
-  let React;
-  let ReactDOM;
-  let ReactDOMClient;
-  let Scheduler;
-  let utils;
-  let assertLog;
-  let waitFor;
+  if (enableComponentPerformanceTrack) {
+    test('no tests', () => {});
+    // Ignore all tests.
+    return;
+  }
 
   describe('User Timing API', () => {
+    if (enableComponentPerformanceTrack) {
+      return;
+    }
     let currentlyNotClearedMarks;
     let registeredMarks;
     let featureDetectionMarkName = null;