Added test to filepath

Added test to make sure base::FilePath::DirName doesn't resolve
directory navigation.

Bug: 
Change-Id: Icbce242d03cc593478669dd160f00d9f8328d420
Reviewed-on: https://chromium-review.googlesource.com/710378
Reviewed-by: Nico Weber <thakis@chromium.org>
Reviewed-by: Chris Palmer <palmer@chromium.org>
Commit-Queue: Anton Urusov <urusant@google.com>
Cr-Commit-Position: refs/heads/master@{#508125}

CrOS-Libchrome-Original-Commit: f3c5a28fc399dc6212f3604ef602d1748ce6aeca
2 files changed
tree: b964141ec4a36c0aeb30455b7187c9a70e940807
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/