Implement HttpUserAgentSettings delegate for Android WebView

Instead of using a static accept language and user agent,
we set a HttpUserAgentSettings delegate to allow those
values to change dynamically.

BUG=35049

Review URL: https://codereview.chromium.org/1172093002

Cr-Commit-Position: refs/heads/master@{#341931}


CrOS-Libchrome-Original-Commit: 67e9830ff10d26bf8840598dde988e4af9581fde
1 file changed
tree: 1bb1c0e795dbb2573ee227fe1733c6494b30f412
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/