Move CancelableTaskTracker to //base/task/CancelableTaskTracker.

CancelableTaskTracker is used by //chrome code that is due to componentized.
This CL moves the class to //base/task and wraps it in the ::base::task namespace.

BUG=335135
TBR=thakis

Review URL: https://codereview.chromium.org/137263007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@249397 0039d316-1c4b-4281-b951-d872f2087c98


CrOS-Libchrome-Original-Commit: e95b717f6d7ebfd44ab20c2caea205cc95e0a74e
5 files changed
tree: 72d6490626bdb8413e3cd5948ec3de4c4fcfce61
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. ipc/
  6. mojo/
  7. testing/
  8. third_party/
  9. ui/