Fix bug in shut down of HTMLViewer

Without this the background thread created by the FontLoader outlives
the HTMLViewer, which leads to random shutdown crashes.

BUG=531120
TEST=none
R=erg@chromium.org

Review URL: https://codereview.chromium.org/1341073004

Cr-Commit-Position: refs/heads/master@{#348769}


CrOS-Libchrome-Original-Commit: e9a036258ac17b528ef498998a50d83393ec807b
1 file changed
tree: 9c4c146efeb4b7132dc212bfdf17dbfcef84eed5
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/