tree 19bbd693692e5606fca204a6612425f07e925bec
parent c75824ac1422e011cb001abc25560aba97d56254
author ztenghui <ztenghui@google.com> 1372107244 -0700
committer ztenghui <ztenghui@google.com> 1372369746 -0700

Save button now behaves correctly for filter changes.

Basically, save the original filter from the file's XMP.
Compare the current filter against original one to decide whether or not the
file has been modified and needed to be saved.

At the same time, make sure we don't save "None" filter in the ImagePreset.

bug:9468909

Change-Id: I5b86ab95556b6b010367c9577b02c0bb42ffb824