mojo: Create a basic clipboard.

This creates a basic clipboard interface and uses it from
html_viewer. This is a minimal implementation and does not actually
interact with the system clipboard.

BUG=411039
First Committed: https://crrev.com/757286d8a2c778fe4622890140c9b9d2afd21063

Review URL: https://codereview.chromium.org/562483002

Cr-Commit-Position: refs/heads/master@{#295182}


CrOS-Libchrome-Original-Commit: b69fbca034e3c2181e0a12cf02baec4de526bf25
17 files changed
tree: 29ab3f8f7a1a1920b73f18d288d5d8cea64a04e3
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/