tree 4d9b0e01a48937c0132b3954b28fd1040de5eaf2
parent c67f9bc2fddc443105811f99401d169dea6da1a4
author Keisuke Kuroyanagi <ksk@google.com> 1469174988 +0900
committer Keisuke Kuroyanagi <ksk@google.com> 1469174988 +0900

Fix: Undo for drag and drop.

Drag and drop operation can be merged with last edit
operation. In this case, insert and delete were recorded as
independent operations even if they were done in one batch
edit.
With this CL, we always create dedicated undo/redo state for
drag and drop.

Bug: 28588666
Bug: 30297308
Bug: 29871372
Change-Id: Ib4cb144c6b9b5aa095bc9208fcdedaa737964126