Sibling layout change doesn't trigger other siblings onLayout.

[cheng-kang]

• Review the documentation: https://facebook.github.io/react-native
• Search for existing issues: https://github.com/facebook/react-native/issues
• Use the latest React Native release: https://github.com/facebook/react-native/releases

Environment

 React Native Environment Info:
 System:
 OS: macOS High Sierra 10.13.6
 CPU: x64 Intel(R) Core(TM) i5-7360U CPU @ 2.30GHz
 Memory: 182.39 MB / 8.00 GB
 Shell: 3.2.57 - /bin/bash
 Binaries:
 Node: 10.4.0 - /usr/local/bin/node
 Yarn: 1.5.1 - /usr/local/bin/yarn
 npm: 6.1.0 - /usr/local/bin/npm
 Watchman: 4.9.0 - /usr/local/bin/watchman
 SDKs:
 iOS SDK:
 Platforms: iOS 11.3, macOS 10.13, tvOS 11.3, watchOS 4.3
 IDEs:
 Android Studio: 3.1 AI-173.4670197
 Xcode: 9.3/9Q117m - /usr/bin/xcodebuild
 npmPackages:
 @storybook/react: ^3.4.5 => 3.4.8
 react: ^16.3.2 => 16.4.1
 react-native: ^0.56.0 => 0.56.0
 npmGlobalPackages:
 create-react-native-app: 1.0.0
 react-native-cli: 2.0.1

Description

Sibling layout change doesn't trigger other siblings onLayout.

Reproducible Demo

https://codesandbox.io/s/k2r38p70jr

This is a react-native-web example. But I've tested it with react-native on iOS simulator, it has the same behaviour.

[cheng-kang]

onLayout shouldn't bother this case.