Switch to new ReactFiberScheduler implementation

Sets the `enableNewScheduler` feature flag to true.

`yarn test` now runs against the new implementation, so use
`yarn test-old-scheduler` to test the old implementation. Both commands
will run in CI, in case we need to revert.

package.json

@@ -102,7 +102,7 @@
     "test": "cross-env NODE_ENV=development jest --config ./scripts/jest/config.source.js",
     "test-persistent": "cross-env NODE_ENV=development jest --config ./scripts/jest/config.source-persistent.js",
     "test-fire": "cross-env NODE_ENV=development jest --config ./scripts/jest/config.source-fire.js",
-    "test-new-scheduler": "cross-env NODE_ENV=development jest --config ./scripts/jest/config.source-new-scheduler.js",
+    "test-old-scheduler": "cross-env NODE_ENV=development jest --config ./scripts/jest/config.source-old-scheduler.js",
     "test-prod": "cross-env NODE_ENV=production jest --config ./scripts/jest/config.source.js",
     "test-fire-prod": "cross-env NODE_ENV=production jest --config ./scripts/jest/config.source-fire.js",
     "test-prod-build": "yarn test-build-prod",

packages/shared/ReactFeatureFlags.js

@@ -67,4 +67,4 @@ export const enableEventAPI = false;
 
 // Enables rewritten version of ReactFiberScheduler. Added in case we need to
 // quickly revert it.
-export const enableNewScheduler = false;
+export const enableNewScheduler = true;

packages/shared/forks/ReactFeatureFlags.native-fb.js

@@ -31,7 +31,7 @@ export const replayFailedUnitOfWorkWithInvokeGuardedCallback = __DEV__;
 export const warnAboutDeprecatedLifecycles = true;
 export const warnAboutDeprecatedSetNativeProps = true;
 export const enableEventAPI = false;
-export const enableNewScheduler = false;
+export const enableNewScheduler = true;
 
 // Only used in www builds.
 export function addUserTimingListener() {

packages/shared/forks/ReactFeatureFlags.native-oss.js

@@ -28,7 +28,7 @@ export const warnAboutShorthandPropertyCollision = false;
 export const enableSchedulerDebugging = false;
 export const warnAboutDeprecatedSetNativeProps = false;
 export const enableEventAPI = false;
-export const enableNewScheduler = false;
+export const enableNewScheduler = true;
 
 // Only used in www builds.
 export function addUserTimingListener() {

packages/shared/forks/ReactFeatureFlags.persistent.js

@@ -28,7 +28,7 @@ export const warnAboutShorthandPropertyCollision = false;
 export const enableSchedulerDebugging = false;
 export const warnAboutDeprecatedSetNativeProps = false;
 export const enableEventAPI = false;
-export const enableNewScheduler = false;
+export const enableNewScheduler = true;
 
 // Only used in www builds.
 export function addUserTimingListener() {

packages/shared/forks/ReactFeatureFlags.test-renderer.js

@@ -28,7 +28,7 @@ export const warnAboutShorthandPropertyCollision = false;
 export const enableSchedulerDebugging = false;
 export const warnAboutDeprecatedSetNativeProps = false;
 export const enableEventAPI = false;
-export const enableNewScheduler = false;
+export const enableNewScheduler = true;
 
 // Only used in www builds.
 export function addUserTimingListener() {

packages/shared/forks/ReactFeatureFlags.test-renderer.www.js

@@ -26,7 +26,7 @@ export const warnAboutDeprecatedSetNativeProps = false;
 export const disableJavaScriptURLs = false;
 export const disableYielding = false;
 export const enableEventAPI = true;
-export const enableNewScheduler = false;
+export const enableNewScheduler = true;
 
 // Only used in www builds.
 export function addUserTimingListener() {

packages/shared/forks/ReactFeatureFlags.www.js

@@ -42,7 +42,7 @@ export const enableSuspenseServerRenderer = true;
 // I've chosen to make this a static flag instead of a dynamic flag controlled
 // by a GK so that it doesn't increase bundle size. It should still be easy
 // to rollback by reverting the commit that turns this on.
-export const enableNewScheduler = false;
+export const enableNewScheduler = true;
 
 let refCount = 0;
 export function addUserTimingListener() {

scripts/circleci/test_entry_point.sh

@@ -11,7 +11,7 @@ if [ $((0 % CIRCLE_NODE_TOTAL)) -eq "$CIRCLE_NODE_INDEX" ]; then
   COMMANDS_TO_RUN+=('node ./scripts/tasks/flow-ci')
   COMMANDS_TO_RUN+=('node ./scripts/tasks/eslint')
   COMMANDS_TO_RUN+=('yarn test --maxWorkers=2')
-  COMMANDS_TO_RUN+=('yarn test-new-scheduler --maxWorkers=2')
+  COMMANDS_TO_RUN+=('yarn test-old-scheduler --maxWorkers=2')
   COMMANDS_TO_RUN+=('yarn test-persistent --maxWorkers=2')
   COMMANDS_TO_RUN+=('./scripts/circleci/check_license.sh')
   COMMANDS_TO_RUN+=('./scripts/circleci/check_modules.sh')

scripts/jest/config.source-new-scheduler.js → scripts/jest/config.source-old-scheduler.js

@@ -5,7 +5,7 @@ const baseConfig = require('./config.base');
 module.exports = Object.assign({}, baseConfig, {
   setupFiles: [
     ...baseConfig.setupFiles,
-    require.resolve('./setupNewScheduler.js'),
+    require.resolve('./setupOldScheduler.js'),
     require.resolve('./setupHostConfigs.js'),
   ],
 });

scripts/jest/setupNewScheduler.js → scripts/jest/setupOldScheduler.js

@@ -2,6 +2,6 @@
 
 jest.mock('shared/ReactFeatureFlags', () => {
   const ReactFeatureFlags = require.requireActual('shared/ReactFeatureFlags');
-  ReactFeatureFlags.enableNewScheduler = true;
+  ReactFeatureFlags.enableNewScheduler = false;
   return ReactFeatureFlags;
 });