docs(CHANGELOG.md): Document ScrollView ES6 conversion

CHANGELOG.md

@@ -21,6 +21,7 @@
 ### Changed
 
 - Major improvements to Flow types for Core Components ([499c195](https://github.com/facebook/react-native/commit/499c195), [fbc5a4f](https://github.com/facebook/react-native/commit/fbc5a4f), [f9050e0](https://github.com/facebook/react-native/commit/f9050e0), [6476151](https://github.com/facebook/react-native/commit/6476151), [c03fc40](https://github.com/facebook/react-native/commit/c03fc40), [69213ee](https://github.com/facebook/react-native/commit/69213ee), [136dfc8](https://github.com/facebook/react-native/commit/136dfc8), [3c0211b](https://github.com/facebook/react-native/commit/3c0211b), [c127000](https://github.com/facebook/react-native/commit/c127000), [636e146](https://github.com/facebook/react-native/commit/636e146), [6fa997d](https://github.com/facebook/react-native/commit/6fa997d), [35a65cd](https://github.com/facebook/react-native/commit/35a65cd), [7927497](https://github.com/facebook/react-native/commit/7927497), [45c5183](https://github.com/facebook/react-native/commit/45c5183), [a97d104](https://github.com/facebook/react-native/commit/a97d104), [fb4825a](https://github.com/facebook/react-native/commit/fb4825a), [84c5416](https://github.com/facebook/react-native/commit/84c5416), [3649a50](https://github.com/facebook/react-native/commit/3649a50) by [@mottox2](https://github.com/mottox2), [@saitoxu](https://github.com/saitoxu), [@RSNara](https://github.com/RSNara), [@watanabeyu](https://github.com/watanabeyu), [@Tnarita0000](https://github.com/Tnarita0000), [@exced](https://github.com/exced), [@nd-02110114](https://github.com/nd-02110114), [@flowkraD](https://github.com/flowkraD))
+- Components were converted to ES6 classes ([ScrollView](https://github.com/facebook/react-native/commit/221e2fe4095bc9ae15878725bdac4071d53e61f5)) by [@thymikee](https://github.com/thymikee).
 - Flow dependency is now at v0.86.0 ([8fb228f](https://github.com/facebook/react-native/commit/8fb228f) by [@panagosg7](https://github.com/panagosg7))
 - metro dependency is now at v0.49.1 ([f867db3](https://github.com/facebook/react-native/commit/f867db3), [8888295](https://github.com/facebook/react-native/commit/8888295), [31bb551](https://github.com/facebook/react-native/commit/31bb551), [de60e86](https://github.com/facebook/react-native/commit/de60e86), and [a525941](https://github.com/facebook/react-native/commit/a525941) by [@alexkirsz](https://github.com/alexkirsz) and [@rafeca](https://github.com/rafeca))
 - jest dependency is now at v24.0.0-alpha.6 ([1b4fd64](https://github.com/facebook/react-native/commit/1b4fd64), [66aba09](https://github.com/facebook/react-native/commit/66aba09), and [06c13b3](https://github.com/facebook/react-native/commit/06c13b3) by [@rafeca](https://github.com/rafeca) and  [@rubennorte](https://github.com/rubennorte))
@@ -30,6 +31,9 @@
 - Clearer error messages when hot reloading ([c787866](https://github.com/facebook/react-native/commit/c787866) by [@alexkirsz](https://github.com/alexkirsz))
 - Allow CxxModules to implement functions which take two callbacks ([8826d8b](https://github.com/facebook/react-native/commit/8826d8b) by [@acoates-ms](https://github.com/acoates-ms))
 
+#### Breaking Changes
+- Public methods of components converted to ES6 classes are no longer bound to their component instance. For `ScrollView`, the affected methods are `setNativeProps`, `getScrollResponder`, `getScrollableNode`, `getInnerViewNode`, `scrollTo`, `scrollToEnd`, `scrollWithoutAnimationTo`, and `flashScrollIndicators`. Therefore, it is no longer safe to pass these method by reference as callbacks to functions. Auto-binding of methods was a behaviour of `createReactClass` that we decided to not preserve when switching over to ES6 classes. 
+
 #### Android specific
 
 - Optimize `PlatformConstants.ServerHost`, `PlatformConstants.isTesting`, and `PlatformConstants.androidID` for performance ([2bf0d54](https://github.com/facebook/react-native/commit/2bf0d54), [339d9d3](https://github.com/facebook/react-native/commit/339d9d3), and [9f9390d](https://github.com/facebook/react-native/commit/9f9390d) by [@stepanhruda](https://github.com/stepanhruda), [@fkgozali](https://github.com/fkgozali), and [@axe-fb](https://github.com/axe-fb))