Remove dead code from modern event system (facebook#19233)

* Remove dead code from modern event system

* Remove SSR dependency on EventPluginRegistry

Author: gaearon

packages/react-dom/src/client/ReactDOM.js

@@ -11,7 +11,6 @@ import type {ReactNodeList} from 'shared/ReactTypes';
 import type {Container} from './ReactDOMHostConfig';
 
 import '../shared/checkReact';
-import './ReactDOMClientInjection';
 import {
   findDOMNode,
   render,
@@ -39,10 +38,7 @@ import {
 } from 'react-reconciler/src/ReactFiberReconciler';
 import {createPortal as createPortalImpl} from 'react-reconciler/src/ReactPortal';
 import {canUseDOM} from 'shared/ExecutionEnvironment';
-import {
-  eventNameDispatchConfigs,
-  injectEventPluginsByName,
-} from '../legacy-events/EventPluginRegistry';
+import {eventNameDispatchConfigs} from '../events/EventPluginRegistry';
 import ReactVersion from 'shared/ReactVersion';
 import invariant from 'shared/invariant';
 import {
@@ -57,7 +53,6 @@ import {
   getClosestInstanceFromNode,
 } from './ReactDOMComponentTree';
 import {restoreControlledState} from './ReactDOMComponent';
-import {dispatchEvent} from '../events/ReactDOMEventListener';
 import {
   setAttemptSynchronousHydration,
   setAttemptUserBlockingHydration,
@@ -180,11 +175,9 @@ const Internals = {
     getInstanceFromNode,
     getNodeFromInstance,
     getFiberCurrentPropsFromNode,
-    injectEventPluginsByName,
     eventNameDispatchConfigs,
     enqueueStateRestore,
     restoreStateIfNeeded,
-    dispatchEvent,
     flushPassiveEffects,
     IsThisRendererActing,
   ],

packages/react-dom/src/client/ReactDOMClientInjection.js

@@ -7,7 +7,10 @@
  * @flow
  */
 
-import {registrationNameModules} from '../legacy-events/EventPluginRegistry';
+import {
+  registrationNameModules,
+  possibleRegistrationNames,
+} from '../events/EventPluginRegistry';
 import {canUseDOM} from 'shared/ExecutionEnvironment';
 import invariant from 'shared/invariant';
 import {
@@ -129,7 +132,10 @@ if (__DEV__) {
   validatePropertiesInDevelopment = function(type, props) {
     validateARIAProperties(type, props);
     validateInputProperties(type, props);
-    validateUnknownProperties(type, props, /* canUseEventSystem */ true);
+    validateUnknownProperties(type, props, {
+      registrationNameModules,
+      possibleRegistrationNames,
+    });
   };
 
   // IE 11 parses & normalizes the style attribute as opposed to other

packages/react-dom/src/client/ReactDOMComponent.js

@@ -17,7 +17,7 @@ import type {
   SuspenseInstance,
   Props,
 } from './ReactDOMHostConfig';
-import type {DOMTopLevelEventType} from '../legacy-events/TopLevelEventTypes';
+import type {DOMTopLevelEventType} from '../events/TopLevelEventTypes';
 
 import {
   HostComponent,

packages/react-dom/src/client/ReactDOMComponentTree.js

@@ -7,7 +7,7 @@
  * @flow
  */
 
-import type {DOMTopLevelEventType} from '../legacy-events/TopLevelEventTypes';
+import type {DOMTopLevelEventType} from '../events/TopLevelEventTypes';
 import type {EventPriority, ReactScopeInstance} from 'shared/ReactTypes';
 import type {
   ReactDOMEventHandle,

packages/react-dom/src/client/ReactDOMEventHandle.js

@@ -7,7 +7,7 @@
  * @flow
  */
 
-import type {TopLevelType} from '../legacy-events/TopLevelEventTypes';
+import type {TopLevelType} from '../events/TopLevelEventTypes';
 import type {Fiber, FiberRoot} from 'react-reconciler/src/ReactInternalTypes';
 import type {
   BoundingRect,

packages/react-dom/src/client/ReactDOMHostConfig.js

@@ -11,11 +11,11 @@ import type {EventPriority} from 'shared/ReactTypes';
 import type {
   TopLevelType,
   DOMTopLevelEventType,
-} from '../legacy-events/TopLevelEventTypes';
+} from '../events/TopLevelEventTypes';
 import type {
   DispatchConfig,
   CustomDispatchConfig,
-} from '../legacy-events/ReactSyntheticEventType';
+} from '../events/ReactSyntheticEventType';
 
 import * as DOMTopLevelEventTypes from './DOMTopLevelEventTypes';
 import {

packages/react-dom/src/events/DOMEventProperties.js

@@ -7,8 +7,8 @@
  * @flow
  */
 
-import type {AnyNativeEvent} from '../legacy-events/PluginModuleType';
-import type {DOMTopLevelEventType} from '../legacy-events/TopLevelEventTypes';
+import type {AnyNativeEvent} from '../events/PluginModuleType';
+import type {DOMTopLevelEventType} from '../events/TopLevelEventTypes';
 import type {
   ElementListenerMap,
   ElementListenerMapEntry,
@@ -22,14 +22,14 @@ import type {
   DispatchQueueItem,
   DispatchQueueItemPhase,
   DispatchQueueItemPhaseEntry,
-} from '../legacy-events/PluginModuleType';
+} from '../events/PluginModuleType';
 import type {
   ReactSyntheticEvent,
   CustomDispatchConfig,
-} from '../legacy-events/ReactSyntheticEventType';
+} from '../events/ReactSyntheticEventType';
 
-import {registrationNameDependencies} from '../legacy-events/EventPluginRegistry';
-import {plugins} from '../legacy-events/EventPluginRegistry';
+import {registrationNameDependencies} from '../events/EventPluginRegistry';
+import {plugins} from '../events/EventPluginRegistry';
 import {
   PLUGIN_EVENT_SYSTEM,
   LEGACY_FB_SUPPORT,

packages/react-dom/src/events/DOMModernPluginEventSystem.js

@@ -7,12 +7,12 @@
  * @flow
  */
 
-import type {DOMTopLevelEventType} from '../legacy-events/TopLevelEventTypes';
+import type {DOMTopLevelEventType} from '../events/TopLevelEventTypes';
 
 import {
   unsafeCastStringToDOMTopLevelType,
   unsafeCastDOMTopLevelTypeToString,
-} from '../legacy-events/TopLevelEventTypes';
+} from '../events/TopLevelEventTypes';
 import getVendorPrefixedEventName from './getVendorPrefixedEventName';
 
 /**

packages/react-dom/src/events/DOMTopLevelEventTypes.js

@@ -12,7 +12,7 @@ import {
   PASSIVE_NOT_SUPPORTED,
   RESPONDER_EVENT_SYSTEM,
 } from './EventSystemFlags';
-import type {AnyNativeEvent} from '../legacy-events/PluginModuleType';
+import type {AnyNativeEvent} from '../events/PluginModuleType';
 import {
   HostComponent,
   ScopeComponent,
@@ -25,7 +25,7 @@ import type {
   ReactDOMResponderContext,
   ReactDOMResponderEvent,
 } from '../shared/ReactDOMTypes';
-import type {DOMTopLevelEventType} from '../legacy-events/TopLevelEventTypes';
+import type {DOMTopLevelEventType} from '../events/TopLevelEventTypes';
 import {
   batchedEventUpdates,
   discreteUpdates,