tree d3c4492ff47a2cd00777d8a03e5981a36da6508e
parent 4a9450325055455875fd657d07f2c5c06f8c5689
author Michael Klimushyn <mklim@google.com> 1573752869 -0800
committer GitHub <noreply@github.com> 1573752869 -0800
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[webview_flutter] Add async NavigationDelegates (#2257)

Previously all navigation decisions needed to be made synchronously in
Dart. The platform layers are already waiting for the MethodChannel
callback, so just changed the return type to be
`FutureOr<NavigationDecision>'. This is a change to the method signature
of `WebViewPlatformCallbacksHandler#onNavigationRequest`, but that
interface appears to only be meant to be implemented internally to the
plugin.