The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/10195bc69820c4cc24e332655aa939e9a6cf374c

commit 10195bc69820c4cc24e332655aa939e9a6cf374c
Author: Luciano Pacheco <lucmult@chromium.org>
Date: Wed Jul 04 07:38:01 2018

Add My Files parent for Downloads (behind flag)

Add My Files parent on navigation tree, navigation_list_model.js
creates the "My Files" entry as a EntryList and EntryListItem on
directory_tree.js is the UI element to display it.

This is a continuation of:
 * crrev.com/c/1086680
 * crrev.com/c/1116400
 * crrev.com/c/1116517

Some changes required to display EntryList:
 * isDescendantEntry: Inspect on each of EntryList's children.
 * FileManager.initializeUI: Fetch asynchronously the flag to be able
to use before displaying the navigation tree.
 * extract the switch (modelItem.type) to its own function, to be able
to reuse it.

Design doc: https://docs.google.com/document/d/1X5XSLKJd0yerL-qFhpb2z9ibUVb_W3gG_tfIV7T_Qt0

Bug:  846587 ,  846592 ,  846591 ,  846590 ,  846589 ,  846588 ,  846586 
Cq-Include-Trybots: luci.chromium.try:closure_compilation
Change-Id: Id8f27f09763d4478b93d52dd32e4ed851c7e448d
Reviewed-on: https://chromium-review.googlesource.com/1113258
Commit-Queue: Luciano Pacheco <lucmult@chromium.org>
Reviewed-by: Naoki Fukino <fukino@chromium.org>
Reviewed-by: Noel Gordon <noel@chromium.org>
Reviewed-by: Sasha Morrissey <sashab@chromium.org>
Cr-Commit-Position: refs/heads/master@{#572507}
[modify] https://crrev.com/10195bc69820c4cc24e332655aa939e9a6cf374c/chrome/app/chromeos_strings.grdp
[add] https://crrev.com/10195bc69820c4cc24e332655aa939e9a6cf374c/chrome/app/chromeos_strings_grdp/IDS_FILE_BROWSER_MY_FILES_ROOT_LABEL.png.sha1
[modify] https://crrev.com/10195bc69820c4cc24e332655aa939e9a6cf374c/chrome/browser/chromeos/extensions/file_manager/private_api_strings.cc
[modify] https://crrev.com/10195bc69820c4cc24e332655aa939e9a6cf374c/chrome/browser/chromeos/file_manager/file_manager_browsertest.cc
[modify] https://crrev.com/10195bc69820c4cc24e332655aa939e9a6cf374c/ui/file_manager/file_manager/background/js/volume_manager_impl.js
[modify] https://crrev.com/10195bc69820c4cc24e332655aa939e9a6cf374c/ui/file_manager/file_manager/common/js/util.js
[modify] https://crrev.com/10195bc69820c4cc24e332655aa939e9a6cf374c/ui/file_manager/file_manager/common/js/volume_manager_common.js
[modify] https://crrev.com/10195bc69820c4cc24e332655aa939e9a6cf374c/ui/file_manager/file_manager/foreground/js/directory_model.js
[modify] https://crrev.com/10195bc69820c4cc24e332655aa939e9a6cf374c/ui/file_manager/file_manager/foreground/js/file_manager.js
[modify] https://crrev.com/10195bc69820c4cc24e332655aa939e9a6cf374c/ui/file_manager/file_manager/foreground/js/navigation_list_model.js
[modify] https://crrev.com/10195bc69820c4cc24e332655aa939e9a6cf374c/ui/file_manager/file_manager/foreground/js/navigation_list_model_unittest.js
[modify] https://crrev.com/10195bc69820c4cc24e332655aa939e9a6cf374c/ui/file_manager/file_manager/foreground/js/ui/directory_tree.js
[modify] https://crrev.com/10195bc69820c4cc24e332655aa939e9a6cf374c/ui/file_manager/file_manager/foreground/js/ui/location_line.js
[add] https://crrev.com/10195bc69820c4cc24e332655aa939e9a6cf374c/ui/file_manager/integration_tests/file_manager/my_files.js
[modify] https://crrev.com/10195bc69820c4cc24e332655aa939e9a6cf374c/ui/file_manager/integration_tests/file_manager_test_manifest.json