Remove ReactInputSelection plugin

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

@@ -22,7 +22,6 @@ var ReactDOMFiberComponent = require('ReactDOMFiberComponent');
 var ReactDOMFrameScheduling = require('ReactDOMFrameScheduling');
 var ReactGenericBatching = require('ReactGenericBatching');
 var ReactFiberReconciler = require('react-reconciler');
-var ReactInputSelection = require('ReactInputSelection');
 var ReactInstanceMap = require('ReactInstanceMap');
 var ReactPortal = require('ReactPortal');
 var ReactVersion = require('ReactVersion');
@@ -113,7 +112,6 @@ type HostContextProd = string;
 type HostContext = HostContextDev | HostContextProd;
 
 let eventsEnabled: ?boolean = null;
-let selectionInformation: ?mixed = null;
 
 /**
  * True if the supplied DOM node is a valid node element.
@@ -216,13 +214,10 @@ var DOMRenderer = ReactFiberReconciler({
 
   prepareForCommit(): void {
     eventsEnabled = ReactBrowserEventEmitter.isEnabled();
-    selectionInformation = ReactInputSelection.getSelectionInformation();
     ReactBrowserEventEmitter.setEnabled(false);
   },
 
   resetAfterCommit(): void {
-    ReactInputSelection.restoreSelection(selectionInformation);
-    selectionInformation = null;
     ReactBrowserEventEmitter.setEnabled(eventsEnabled);
     eventsEnabled = null;
   },

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

@@ -13,7 +13,6 @@ var EventPropagators = require('EventPropagators');
 var ExecutionEnvironment = require('fbjs/lib/ExecutionEnvironment');
 var ReactBrowserEventEmitter = require('ReactBrowserEventEmitter');
 var ReactDOMComponentTree = require('ReactDOMComponentTree');
-var ReactInputSelection = require('ReactInputSelection');
 var SyntheticEvent = require('SyntheticEvent');
 var {DOCUMENT_NODE} = require('HTMLNodeType');
 
@@ -55,6 +54,22 @@ var mouseDown = false;
 var isListeningToAllDependencies =
   ReactBrowserEventEmitter.isListeningToAllDependencies;
 
+/**
+ * Determine if a node can have a selection associated with it.
+ *
+ * @param {DOMElement} node
+ * @return {boolean} True if the node can have a selection.
+ */
+function hasSelectionCapabilities(node) {
+  var nodeName = node && node.nodeName && node.nodeName.toLowerCase();
+  return (
+    nodeName &&
+    ((nodeName === 'input' && node.type === 'text') ||
+      nodeName === 'textarea' ||
+      node.contentEditable === 'true')
+  );
+}
+
 /**
  * Get an object which is a unique representation of the current selection.
  *
@@ -67,7 +82,7 @@ var isListeningToAllDependencies =
 function getSelection(node) {
   if (
     'selectionStart' in node &&
-    ReactInputSelection.hasSelectionCapabilities(node)
+    hasSelectionCapabilities(node)
   ) {
     return {
       start: node.selectionStart,