Fix key events propagation #296
Merged
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This PR contains the following various fixes.
text_input_channel.cc(theelsestatement should come after#endif).TextInputChannel::SendKeyreturnfalseby default and check if the given key is actually handled byHandleKey. This fixes a problem of back button not responding when a TextField has a focus and a software keyboard is closed.PlatformViewChannel::SendKeytoboolto allow platform views to intercept key events without propagating to other handlers.Note:
TextInputChannel::HandleKeyhandles only key down events and thus some key up events (Left,Home, and etc.) are still redundantly propagated toPlatformViewChannelandKeyEventChannel.