Mojo C++ bindings: make String16 and gfx::Size available in Blink

This CL adds C++ bindings for String16 and Size in Blink, which will
be used in a follow-up CL (https://codereview.chromium.org/2367393002/).

BUG=624136,649630

Review-Url: https://codereview.chromium.org/2379993003
Cr-Commit-Position: refs/heads/master@{#423487}


CrOS-Libchrome-Original-Commit: fb032b1e3fec6f34883a1f432ff38cebb6875045
6 files changed
tree: 1fb2ca8068c07aa4def113678e8ef0039e5f5d2e
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/