message: Refactor AriaControlNav
diff: import React from 'react'
  -import { withStyles, WithStylesProps } from '../../../styles'
  import { Button } from '../Button'
  import { HFlow } from '../Flow/HFlow'
  import { Icon } from '../Icon'
  -export interface AriaControlNavProps extends WithStylesProps {}
  +export interface AriaControlNavProps {}
  +
  +export function AriaControlNav(props: AriaControlNavProps) {
  + const handleDecreaseFont = () => null
  + const handleIncreaseFont = () => null
  + const handleContrastChange = () => null
  -@withStyles
  -export class AriaControlNav extends React.Component<AriaControlNavProps> {
  - render() {
  return (
  <HFlow hSpacing={0.5}>
  - <Button size='small' skin='ghost' onClick={this.handleDecreaseFont}>
  + <Button size='small' skin='ghost' onClick={handleDecreaseFont}>
  <Icon icon='decreaseFont' />
  </Button>
  - <Button size='small' skin='ghost' onClick={this.handleIncreaseFont}>
  + <Button size='small' skin='ghost' onClick={handleIncreaseFont}>
  <Icon icon='increaseFont' />
  </Button>
  - <Button size='small' skin='ghost' onClick={this.handleContrastChange}>
  + <Button size='small' skin='ghost' onClick={handleContrastChange}>
  <Icon icon='contrast' />
  </Button>
  </HFlow>
  )
  }
  -
  - private handleDecreaseFont = () => {
  - return null
  - }
  -
  - private handleIncreaseFont = () => {
  - return null
  - }
  -
  - private handleContrastChange = () => {
  - return null
  - }
  -}
  