Rename setTiming to applyAnimation

Summary:Given that you can do all kinds of animations other than `Animated.timing`, it made no sense to have `setTiming`. In addition, you can't intuitively tell that this is the callback where you would do custom animations.

The discussion took place on Discord with ericvicenti: https://discordapp.com/channels/102860784329052160/154015578669973504
Closes https://github.com/facebook/react-native/pull/6235

Differential Revision: D2999121

Pulled By: hedgerwang

fb-gh-sync-id: f587b865de11ba5e8dc9c430720252ffb5d12794
shipit-source-id: f587b865de11ba5e8dc9c430720252ffb5d12794

Examples/UIExplorer/NavigationExperimental/NavigationAnimatedExample.js

@@ -78,7 +78,7 @@ class NavigationAnimatedExample extends React.Component {
         navigationState={navigationState}
         style={styles.animatedView}
         renderOverlay={this._renderHeader}
-        setTiming={(pos, navState) => {
+        applyAnimation={(pos, navState) => {
           Animated.timing(pos, {toValue: navState.index, duration: 1000}).start();
         }}
         renderScene={this._renderCard}

Libraries/CustomComponents/NavigationExperimental/NavigationCardStack.js

@@ -77,16 +77,16 @@ const defaultProps = {
  * A controlled navigation view that renders a list of cards.
  */
 class NavigationCardStack extends React.Component {
+  _applyAnimation: NavigationAnimationSetter;
   _renderScene : NavigationSceneRenderer;
-  _setTiming: NavigationAnimationSetter;
 
   constructor(props: Props, context: any) {
     super(props, context);
   }
 
-  componentWillMount() {
+  componentWillMount(): void {
+    this._applyAnimation = this._applyAnimation.bind(this);
     this._renderScene = this._renderScene.bind(this);
-    this._setTiming = this._setTiming.bind(this);
   }
 
   shouldComponentUpdate(nextProps: Object, nextState: Object): boolean {
@@ -103,7 +103,7 @@ class NavigationCardStack extends React.Component {
         navigationState={this.props.navigationState}
         renderOverlay={this.props.renderOverlay}
         renderScene={this._renderScene}
-        setTiming={this._setTiming}
+        setTiming={this._applyAnimation}
         style={[styles.animatedView, this.props.style]}
       />
     );
@@ -120,7 +120,7 @@ class NavigationCardStack extends React.Component {
     );
   }
 
-  _setTiming(
+  _applyAnimation(
     position: NavigationAnimatedValue,
     navigationState: NavigationParentState,
   ): void {

Libraries/NavigationExperimental/NavigationAnimatedView.js

@@ -63,12 +63,12 @@ function compareScenes(
 }
 
 type Props = {
+  applyAnimation: NavigationAnimationSetter,
   navigationState: NavigationParentState,
   onNavigate: (action: any) => void,
-  renderScene: NavigationSceneRenderer,
   renderOverlay: ?NavigationSceneRenderer,
+  renderScene: NavigationSceneRenderer,
   style: any,
-  setTiming: NavigationAnimationSetter,
 };
 
 type State = {
@@ -79,15 +79,15 @@ type State = {
 const {PropTypes} = React;
 
 const propTypes = {
+  applyAnimation: PropTypes.func,
   navigationState: NavigationPropTypes.navigationState.isRequired,
   onNavigate: PropTypes.func.isRequired,
-  renderScene: PropTypes.func.isRequired,
   renderOverlay: PropTypes.func,
-  setTiming: PropTypes.func,
+  renderScene: PropTypes.func.isRequired,
 };
 
 const defaultProps = {
-  setTiming: (
+  applyAnimation: (
     position: NavigationAnimatedValue,
     navigationState: NavigationParentState,
   ) => {
@@ -152,7 +152,7 @@ class NavigationAnimatedView
 
   componentDidUpdate(lastProps: Props): void {
     if (lastProps.navigationState.index !== this.props.navigationState.index) {
-      this.props.setTiming(
+      this.props.applyAnimation(
         this.state.position,
         this.props.navigationState,
         lastProps.navigationState