Use float for scroll offset.

Previously, scroll offsets were stored in a mix of float, double,
and int.

BUG=470718
R=skobes@chromium.org,bokan@chromium.org,aelias@chromium.org
CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel

Review-Url: https://codereview.chromium.org/2387883002
Cr-Commit-Position: refs/heads/master@{#423772}


CrOS-Libchrome-Original-Commit: 80e6cf8d1fa064239b919bd111dc9304209dc9d3
3 files changed
tree: 90380b1b89318a01a8601a8a4b6f82abc3b28cec
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/