Remove eventTime field from class Update type (#26219)

`eventTime` is a vestigial field that can be cleaned up. It was
originally used as part of the starvation mechanism but it's since been
replaced by a per-lane field on the root.

This is a part of a series of smaller refactors I'm doing to
simplify/speed up the `setState` path, related to the Sync Unification
project that @tyao1 has been working on.

DiffTrain build for commit c04b180.

Author: acdlite

compiled/facebook-www/REVISION

@@ -1 +1 @@
-212b89fa25fd0a39473e845d1665d45f9da9dad3
+c04b18070145b82111e1162729f4776f4d2c6112

compiled/facebook-www/REVISION_TRANSFORMS

@@ -1 +1 @@
-212b89fa25fd0a39473e845d1665d45f9da9dad3
+c04b18070145b82111e1162729f4776f4d2c6112

compiled/facebook-www/React-dev.classic.js

@@ -27,7 +27,7 @@ if (
 }
           "use strict";
 
-var ReactVersion = "18.3.0-www-classic-212b89fa2-20230221";
+var ReactVersion = "18.3.0-www-classic-c04b18070-20230222";
 
 // ATTENTION
 // When adding new symbols to this file,

compiled/facebook-www/React-dev.modern.js

@@ -27,7 +27,7 @@ if (
 }
           "use strict";
 
-var ReactVersion = "18.3.0-www-modern-212b89fa2-20230221";
+var ReactVersion = "18.3.0-www-modern-c04b18070-20230222";
 
 // ATTENTION
 // When adding new symbols to this file,

compiled/facebook-www/React-prod.classic.js

@@ -646,4 +646,4 @@ exports.useSyncExternalStore = function (
   );
 };
 exports.useTransition = useTransition;
-exports.version = "18.3.0-www-classic-212b89fa2-20230221";
+exports.version = "18.3.0-www-classic-c04b18070-20230222";

compiled/facebook-www/React-prod.modern.js

@@ -638,4 +638,4 @@ exports.useSyncExternalStore = function (
   );
 };
 exports.useTransition = useTransition;
-exports.version = "18.3.0-www-modern-212b89fa2-20230221";
+exports.version = "18.3.0-www-modern-c04b18070-20230222";

compiled/facebook-www/React-profiling.classic.js

@@ -657,7 +657,7 @@ exports.useSyncExternalStore = function (
   );
 };
 exports.useTransition = useTransition;
-exports.version = "18.3.0-www-classic-212b89fa2-20230221";
+exports.version = "18.3.0-www-classic-c04b18070-20230222";
 
           /* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */
 if (

compiled/facebook-www/React-profiling.modern.js

@@ -649,7 +649,7 @@ exports.useSyncExternalStore = function (
   );
 };
 exports.useTransition = useTransition;
-exports.version = "18.3.0-www-modern-212b89fa2-20230221";
+exports.version = "18.3.0-www-modern-c04b18070-20230222";
 
           /* global __REACT_DEVTOOLS_GLOBAL_HOOK__ */
 if (

compiled/facebook-www/ReactART-dev.classic.js

@@ -69,7 +69,7 @@ function _assertThisInitialized(self) {
   return self;
 }
 
-var ReactVersion = "18.3.0-www-classic-212b89fa2-20230221";
+var ReactVersion = "18.3.0-www-classic-c04b18070-20230222";
 
 var LegacyRoot = 0;
 var ConcurrentRoot = 1;
@@ -4321,9 +4321,8 @@ function cloneUpdateQueue(current, workInProgress) {
     workInProgress.updateQueue = clone;
   }
 }
-function createUpdate(eventTime, lane) {
+function createUpdate(lane) {
   var update = {
-    eventTime: eventTime,
     lane: lane,
     tag: UpdateState,
     payload: null,
@@ -4439,7 +4438,6 @@ function enqueueCapturedUpdate(workInProgress, capturedUpdate) {
 
         do {
           var clone = {
-            eventTime: update.eventTime,
             lane: update.lane,
             tag: update.tag,
             payload: update.payload,
@@ -4652,11 +4650,9 @@ function processUpdateQueue(workInProgress, props, instance, renderLanes) {
     var update = firstBaseUpdate;
 
     do {
-      // TODO: Don't need this field anymore
-      var updateEventTime = update.eventTime; // An extra OffscreenLane bit is added to updates that were made to
+      // An extra OffscreenLane bit is added to updates that were made to
       // a hidden tree, so that we can distinguish them from updates that were
       // already there when the tree was hidden.
-
       var updateLane = removeLanes(update.lane, OffscreenLane);
       var isHiddenUpdate = updateLane !== update.lane; // Check if this update was made while the tree was hidden. If so, then
       // it's not a "base" update and we should disregard the extra base lanes
@@ -4671,7 +4667,6 @@ function processUpdateQueue(workInProgress, props, instance, renderLanes) {
         // skipped update, the previous update/state is the new base
         // update/state.
         var clone = {
-          eventTime: updateEventTime,
           lane: updateLane,
           tag: update.tag,
           payload: update.payload,
@@ -4691,7 +4686,6 @@ function processUpdateQueue(workInProgress, props, instance, renderLanes) {
         // This update does have sufficient priority.
         if (newLastBaseUpdate !== null) {
           var _clone = {
-            eventTime: updateEventTime,
             // This update is going to be committed so we never want uncommit
             // it. Using NoLane works because 0 is a subset of all bitmasks, so
             // this will never be skipped by the check above.
@@ -9302,11 +9296,11 @@ function refreshCache(fiber, seedKey, seedValue) {
       case HostRoot: {
         // Schedule an update on the cache boundary to trigger a refresh.
         var lane = requestUpdateLane(provider);
-        var eventTime = requestEventTime();
-        var refreshUpdate = createUpdate(eventTime, lane);
+        var refreshUpdate = createUpdate(lane);
         var root = enqueueUpdate(provider, refreshUpdate, lane);
 
         if (root !== null) {
+          var eventTime = requestEventTime();
           scheduleUpdateOnFiber(root, provider, lane, eventTime);
           entangleTransitions(root, provider, lane);
         } // TODO: If a refresh never commits, the new cache created here must be
@@ -10915,9 +10909,8 @@ var classComponentUpdater = {
   // $FlowFixMe[missing-local-annot]
   enqueueSetState: function (inst, payload, callback) {
     var fiber = get(inst);
-    var eventTime = requestEventTime();
     var lane = requestUpdateLane(fiber);
-    var update = createUpdate(eventTime, lane);
+    var update = createUpdate(lane);
     update.payload = payload;
 
     if (callback !== undefined && callback !== null) {
@@ -10931,6 +10924,7 @@ var classComponentUpdater = {
     var root = enqueueUpdate(fiber, update, lane);
 
     if (root !== null) {
+      var eventTime = requestEventTime();
       scheduleUpdateOnFiber(root, fiber, lane, eventTime);
       entangleTransitions(root, fiber, lane);
     }
@@ -10950,9 +10944,8 @@ var classComponentUpdater = {
   },
   enqueueReplaceState: function (inst, payload, callback) {
     var fiber = get(inst);
-    var eventTime = requestEventTime();
     var lane = requestUpdateLane(fiber);
-    var update = createUpdate(eventTime, lane);
+    var update = createUpdate(lane);
     update.tag = ReplaceState;
     update.payload = payload;
 
@@ -10967,6 +10960,7 @@ var classComponentUpdater = {
     var root = enqueueUpdate(fiber, update, lane);
 
     if (root !== null) {
+      var eventTime = requestEventTime();
       scheduleUpdateOnFiber(root, fiber, lane, eventTime);
       entangleTransitions(root, fiber, lane);
     }
@@ -10987,9 +10981,8 @@ var classComponentUpdater = {
   // $FlowFixMe[missing-local-annot]
   enqueueForceUpdate: function (inst, callback) {
     var fiber = get(inst);
-    var eventTime = requestEventTime();
     var lane = requestUpdateLane(fiber);
-    var update = createUpdate(eventTime, lane);
+    var update = createUpdate(lane);
     update.tag = ForceUpdate;
 
     if (callback !== undefined && callback !== null) {
@@ -11003,6 +10996,7 @@ var classComponentUpdater = {
     var root = enqueueUpdate(fiber, update, lane);
 
     if (root !== null) {
+      var eventTime = requestEventTime();
       scheduleUpdateOnFiber(root, fiber, lane, eventTime);
       entangleTransitions(root, fiber, lane);
     }
@@ -12078,7 +12072,7 @@ function logCapturedError(boundary, errorInfo) {
 }
 
 function createRootErrorUpdate(fiber, errorInfo, lane) {
-  var update = createUpdate(NoTimestamp, lane); // Unmount the root by rendering null.
+  var update = createUpdate(lane); // Unmount the root by rendering null.
 
   update.tag = CaptureUpdate; // Caution: React DevTools currently depends on this property
   // being called "element".
@@ -12097,7 +12091,7 @@ function createRootErrorUpdate(fiber, errorInfo, lane) {
 }
 
 function createClassErrorUpdate(fiber, errorInfo, lane) {
-  var update = createUpdate(NoTimestamp, lane);
+  var update = createUpdate(lane);
   update.tag = CaptureUpdate;
   var getDerivedStateFromError = fiber.type.getDerivedStateFromError;
 
@@ -12257,7 +12251,7 @@ function markSuspenseBoundaryShouldCapture(
           // When we try rendering again, we should not reuse the current fiber,
           // since it's known to be in an inconsistent state. Use a force update to
           // prevent a bail out.
-          var update = createUpdate(NoTimestamp, SyncLane);
+          var update = createUpdate(SyncLane);
           update.tag = ForceUpdate;
           enqueueUpdate(sourceFiber, update, SyncLane);
         }
@@ -16444,7 +16438,7 @@ function propagateContextChange_eager(workInProgress, context, renderLanes) {
           if (fiber.tag === ClassComponent) {
             // Schedule a force update on the work-in-progress.
             var lane = pickArbitraryLane(renderLanes);
-            var update = createUpdate(NoTimestamp, lane);
+            var update = createUpdate(lane);
             update.tag = ForceUpdate; // TODO: Because we don't have a work-in-progress, this will add the
             // update to the current fiber, too, which means it will persist even if
             // this render is thrown away. Since it's a race condition, not sure it's
@@ -27517,7 +27511,6 @@ function updateContainer(element, container, parentComponent, callback) {
   }
 
   var current$1 = container.current;
-  var eventTime = requestEventTime();
   var lane = requestUpdateLane(current$1);
 
   if (enableSchedulingProfiler) {
@@ -27546,7 +27539,7 @@ function updateContainer(element, container, parentComponent, callback) {
     }
   }
 
-  var update = createUpdate(eventTime, lane); // Caution: React DevTools currently depends on this property
+  var update = createUpdate(lane); // Caution: React DevTools currently depends on this property
   // being called "element".
 
   update.payload = {
@@ -27571,6 +27564,7 @@ function updateContainer(element, container, parentComponent, callback) {
   var root = enqueueUpdate(current$1, update, lane);
 
   if (root !== null) {
+    var eventTime = requestEventTime();
     scheduleUpdateOnFiber(root, current$1, lane, eventTime);
     entangleTransitions(root, current$1, lane);
   }