tree d087e79866c9b0e58ec6e8dc5c31fd550a315681
parent 4bf79089c44088ceb8a9f6485949e1dcd7fc30f6
author Bryce Lee <brycelee@google.com> 1498162468 -0700
committer Bryce Lee <brycelee@google.com> 1498800741 -0700

Ensure all WindowStates are considered before determining all drawn.

The drawn state of an AppWindowToken is calculated on demand in
updateAllDrawn. updateAllDrawn assumes that updateDrawnWindowStates
has been called on every child window beforehand. If a window has
been added but not had updateDrawnWindowStates called for it, the
results of updateAllDrawn will be wrong. This leads to situations
where we will determine we are ready to execute a transition to
home, yet not have a wallpaper activity.

This changelist addresses this issue by recording which WindowStates
have had updateDrawnWindowStates called on them and making sure all
present children have been processed in updateAllDrawn.

Bug: 62846907
Test: go/wm-smoke
Test: turn launcher rotation on, open dialer in portrait, turn off
      screen, rotate to landscape, unlock with fingerprint, press
      home while rotating. make sure transition is correct.

Change-Id: I3d129e686326d868862ae988725fb091a2c86e4e