Reland "Sandbox html_viewer on Linux."

This fixes a midair collision with a file move.

This creates a font_service which does the same role as
font_config_ipc_linux.cc does in content/. This lets us sandbox the
html_viewer, while still being able to communicate with fontconfig.

Also prewarms the ICU timezone data, along with doing all the
prewarming that's done in the core_services sandbox.

BUG=492524
NOPRESUBMIT=true
First Review URL: https://codereview.chromium.org/1274743004

Review URL: https://codereview.chromium.org/1280043003

Cr-Commit-Position: refs/heads/master@{#342409}


CrOS-Libchrome-Original-Commit: 7eb0efde374571b5c76417c7df061fee4cd7acd8
3 files changed
tree: 889d0f8f815b91d39a60a18e6bac0c159c01befb
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/