Make Android HttpNegotiateAuthenticator work without an activity

Fallback on the various alternatives to
AccountManager#getAuthTokenByFeatures that don't require an
activity when we don't have one. This will allow using this
authenticator in WebView.

BUG=533513

Review URL: https://codereview.chromium.org/1422693002

Cr-Commit-Position: refs/heads/master@{#361871}


CrOS-Libchrome-Original-Commit: 2a88ce48d75d70f24c210bcc0ae64b9314e65d78
1 file changed
tree: ad94cd289a62838da7b3f800aaee5d936c70562c
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/