Editor: Strip newlines via onChange value assignment

client/post-editor/editor-title/index.jsx

@@ -80,7 +80,7 @@ export default React.createClass( {
 			return;
 		}
 
-		this.setTitle( event.target.value );
+		this.setTitle( event.target.value.replace( /[\r\n]+/g, ' ' ) );
 		this.props.onChange( event );
 	},
 
@@ -94,37 +94,6 @@ export default React.createClass( {
 		this.onChange( event );
 	},
 
-	stripPasteNewlines( event ) {
-		// `window.clipboardData` deprecated as of Microsoft Edge
-		// See: https://msdn.microsoft.com/library/ms535220(v=vs.85).aspx
-		const clipboard = event.clipboardData || window.clipboardData;
-		if ( ! clipboard ) {
-			return;
-		}
-
-		event.preventDefault();
-
-		let text = clipboard.getData( 'Text' ) || clipboard.getData( 'text/plain' );
-		if ( ! text ) {
-			return;
-		}
-
-		// Replace any newline characters with a single space
-		text = text.replace( /[\r\n]+/g, ' ' );
-
-		// Splice trimmed text into current title selection
-		const { value, selectionStart, selectionEnd } = event.target;
-		const valueChars = value.split( '' );
-		valueChars.splice( selectionStart, selectionEnd - selectionStart, text );
-		const newTitle = valueChars.join( '' );
-
-		// To preserve caret location, we track intended selection point to be
-		// restored after next render pass
-		this.selectionStart = selectionStart + text.length;
-
-		this.setTitle( newTitle );
-	},
-
 	preventEnterKeyPress( event ) {
 		if ( 'Enter' === event.key || 13 === event.charCode ) {
 			event.preventDefault();
@@ -154,7 +123,6 @@ export default React.createClass( {
 						placeholder={ this.translate( 'Title' ) }
 						onChange={ this.onChange }
 						onBlur={ this.onBlur }
-						onPaste={ this.stripPasteNewlines }
 						onKeyPress={ this.preventEnterKeyPress }
 						autoFocus={ isNew && ! isMobile() }
 						value={ post ? post.title : '' }