Fix poor typing performance on iOS devices.

web/react/components/create_post.jsx

@@ -117,7 +117,6 @@ export default class CreatePost extends React.Component {
 
             Client.createPost(post, channel,
                 function handlePostSuccess(data) {
-                    this.resizePostHolder();
                     AsyncClient.getPosts();
 
                     let member = ChannelStore.getMember(channel.id);
@@ -129,7 +128,7 @@ export default class CreatePost extends React.Component {
                         type: ActionTypes.RECIEVED_POST,
                         post: data
                     });
-                }.bind(this),
+                },
                 function handlePostError(err) {
                     let state = {};
 
@@ -149,9 +148,6 @@ export default class CreatePost extends React.Component {
             );
         }
     }
-    componentDidUpdate() {
-        this.resizePostHolder();
-    }
     postMsgKeyPress(e) {
         if (e.which === 13 && !e.shiftKey && !e.altKey) {
             e.preventDefault();
@@ -166,7 +162,6 @@ export default class CreatePost extends React.Component {
         }
     }
     handleUserInput(messageText) {
-        this.resizePostHolder();
         this.setState({messageText: messageText});
 
         let draft = PostStore.getCurrentDraft();
@@ -317,6 +312,7 @@ export default class CreatePost extends React.Component {
                         <Textbox
                             onUserInput={this.handleUserInput}
                             onKeyPress={this.postMsgKeyPress}
+                            onHeightChange={this.resizePostHolder}
                             messageText={this.state.messageText}
                             createMessage='Write a message...'
                             channelId={this.state.channelId}