Add SurfaceSequence mojom file to cc/ipc and edit corresponding GYP file

This patch is to facilitate landing a new mojo service in another patch
(https://codereview.chromium.org/2036663003/) which requires
to import both surface_id and surface_sequence in mojom files. It adds
surface_sequence.mojom and include both it and surface_id.mojom into GYP
compilation (Currently it's only included in GN build).

BUG=None
CQ_INCLUDE_TRYBOTS=tryserver.blink:linux_blink_rel

Review-Url: https://codereview.chromium.org/2043833002
Cr-Commit-Position: refs/heads/master@{#398590}
10 files changed