Files.app: Add sort menu to the toolbar.
This CL adds sort button on the toolbar.
By the sort button, following sorting options will be displayed:
- Sort by Name (always in ascending order)
- Sort by Size (always in descending order)
- Sort by Type (always in ascending order)
- Sort by Date mofidied (always in descending order)
Clicking column headers has the same effect as the options above.
BUG=438915
TEST=run browser_tests --gtest_filter=*FileManager*
TBR=yoshiki@chromium.org
Review URL: https://codereview.chromium.org/
1136523005
Cr-Commit-Position: refs/heads/master@{#329052}