tree 3c9be07cad60efb54a09864703058d24dc420187
parent edf10b18c5b86bc7e68b79d1bf47ae58e5d3aed3
author Craig Mautner <cmautner@google.com> 1365912658 -0700
committer Craig Mautner <cmautner@google.com> 1366058807 -0700

Implement stack splitting and task movement.

Split stacks and move tasks between them. Layout the windows
according to the new stack split.

After layout content rectangles are known split the available area
between all stack boxes. Then use those values for future layout.

Provide stack contents to ActivityManager.

Change-Id: I9746e6185445633810d506be514d0b7b540a7f99