BrowserPlatform constructor Null safety

1. Flutter
2. webdriver.sync_io
3. BrowserPlatform
4. BrowserPlatform constructor

BrowserPlatform class

1. Constructors
2. BrowserPlatform
3. Properties
4. hashCode
5. runtimeType
6. Methods
7. noSuchMethod
8. toString
9. Operators
10. operator ==
11. Constants
12. android
13. linux
14. mac
15. windows