a7ef8dadbc
If a file is deleted and a user marks it as reviewed, copy the reviewed mark onto newer revisions provided the same content has been deleted. Checking the content of the deleted file allows reviewers to re-examine a delete after a rebase, in case there is content in the newer deleted revision that needs to be considered to be moved elsewhere. Rewrite the copying process to iterate the 2 or 4 trees exactly once, relying on a PathFilterGroup to identify the relevant files. This should be faster on larger changes as it avoids revisting trees. It is also easier to handle the 2 additional trees for the ancestor content check on deleted files. Change-Id: Ic710ca2971e66ea919ee1c9f51eb42538174e7b3