Cherrypick warning and removal of react create class (facebook#9771)

* react-create-class -> create-react-class

* Fix issues/bugs introduced by merge conflict resolution

**what is the change?:**
A couple of bugs and holes were introduced when cherry-picking facebook#9232 onto the 15.6 branch. This fixes them.
We also needed to add some logic from facebook#9399

**why make this change?:**
To keep tests passing and get this change working.

**test plan:**
`yarn test`

**issue:**
facebook#9398

* Move component base classes into a single file (facebook#8918)

* More fixes for issues introduced by rebasing

**what is the change?:**
- Remove some outdated 'require' statements that got orphaned in 'React.js'
- Change 'warning' to 'lowPriorityWarning' for 'React.createClass'
- Fix syntax issues in 'React-test'
- Use 'creatReactClass' instead of ES6 class in ReactART
- Update 'prop-type' dependency to use no higher than 15.7 because 15.8 limits the number of warnings, and this causes a test to fail.
- Fix some mixed-up and misnamed variables in `React.js`
- Rebase onto commit that updates deprecation messages
- Update a test based on new deprecation messages

**why make this change?:**
These were bugs introduced by rebasing and tests caught the regressions.

**test plan:**
`yarn test`

**issue:**
facebook#9398

* Reset `yarn.lock`

**what is the change?:**
I didn't mean to commit changes to `yarn.lock` except for the `prop-types` and `create-react-class` updates.

**why make this change?:**
To minimize the changes we make to dependency versions.

**test plan:**
`rm -rf node_modules`
`yarn install`
`yarn run build`
`yarn test`

* Run `yarn prettier`

package.json

@@ -40,7 +40,6 @@
     "coffee-script": "^1.8.0",
     "core-js": "^2.2.1",
     "coveralls": "^2.11.6",
-    "create-react-class": "15.5.0",
     "del": "^2.0.2",
     "derequire": "^2.0.3",
     "eslint": "^3.10.2",
@@ -72,7 +71,6 @@
     "object-assign": "^4.1.1",
     "platform": "^1.1.0",
     "prettier": "^1.2.2",
-    "prop-types": "15.5.7",
     "run-sequence": "^1.1.4",
     "through2": "^2.0.0",
     "tmp": "~0.0.28",
@@ -85,6 +83,10 @@
     "node": "4.x || 5.x || 6.x || 7.x",
     "npm": "2.x || 3.x || 4.x"
   },
+  "dependencies": {
+    "create-react-class": "^15.5.2",
+    "prop-types": "15.5.7"
+  },
   "commonerConfig": {
     "version": 7
   },

src/isomorphic/React.js

@@ -11,15 +11,14 @@
 
 'use strict';
 
+var ReactBaseClasses = require('ReactBaseClasses');
 var ReactChildren = require('ReactChildren');
-var ReactComponent = require('ReactComponent');
-var ReactPureComponent = require('ReactPureComponent');
-var ReactClass = require('ReactClass');
 var ReactDOMFactories = require('ReactDOMFactories');
 var ReactElement = require('ReactElement');
 var ReactPropTypes = require('ReactPropTypes');
 var ReactVersion = require('ReactVersion');
 
+var createReactClass = require('createClass');
 var onlyChild = require('onlyChild');
 
 var createElement = ReactElement.createElement;
@@ -80,8 +79,8 @@ var React = {
     only: onlyChild,
   },
 
-  Component: ReactComponent,
-  PureComponent: ReactPureComponent,
+  Component: ReactBaseClasses.Component,
+  PureComponent: ReactBaseClasses.PureComponent,
 
   createElement: createElement,
   cloneElement: cloneElement,
@@ -90,7 +89,7 @@ var React = {
   // Classic
 
   PropTypes: ReactPropTypes,
-  createClass: ReactClass.createClass,
+  createClass: createReactClass,
   createFactory: createFactory,
   createMixin: createMixin,
 
@@ -104,8 +103,8 @@ var React = {
   __spread: __spread,
 };
 
-// TODO: Fix tests so that this deprecation warning doesn't cause failures.
 if (__DEV__) {
+  let warnedForCreateClass = false;
   if (canDefineProperty) {
     Object.defineProperty(React, 'PropTypes', {
       get() {
@@ -122,6 +121,20 @@ if (__DEV__) {
         return ReactPropTypes;
       },
     });
+
+    Object.defineProperty(React, 'createClass', {
+      get: function() {
+        lowPriorityWarning(
+          warnedForCreateClass,
+          'React.createClass is no longer supported. Use a plain JavaScript ' +
+            "class instead. If you're not yet ready to migrate, " +
+            'create-react-class is available on npm as a temporary, ' +
+            'drop-in replacement.',
+        );
+        warnedForCreateClass = true;
+        return createReactClass;
+      },
+    });
   }
 
   // React.DOM factories are deprecated. Wrap these methods so that

src/isomorphic/__tests__/React-test.js

@@ -37,4 +37,34 @@ describe('React', () => {
       'React.createMixin is deprecated and should not be used',
     );
   });
+
+  it('should warn once when attempting to access React.createClass', () => {
+    spyOn(console, 'warn');
+    let createClass = React.createClass;
+    createClass = React.createClass;
+    expect(createClass).not.toBe(undefined);
+    expect(console.warn.calls.count()).toBe(1);
+    expect(console.warn.calls.argsFor(0)[0]).toContain(
+      'React.createClass is no longer supported. Use a plain ' +
+        "JavaScript class instead. If you're not yet ready to migrate, " +
+        'create-react-class is available on npm as a temporary, ' +
+        'drop-in replacement.',
+    );
+  });
+
+  it('should warn once when attempting to access React.PropTypes', () => {
+    spyOn(console, 'warn');
+    let PropTypes = React.PropTypes;
+    PropTypes = React.PropTypes;
+    expect(PropTypes).not.toBe(undefined);
+    expect(console.warn.calls.count()).toBe(1);
+    expect(console.warn.calls.argsFor(0)[0]).toContain(
+      'Warning: Accessing PropTypes via the main React package is ' +
+        'deprecated, and will be removed in  React v16.0. ' +
+        'Use the prop-types package from npm instead. ' +
+        'Version 15.5.10 provides a drop-in replacement. ' +
+        'For info on usage, compatibility, migration and more, ' +
+        'see https://fb.me/prop-types-docs',
+    );
+  });
 });