Replace .mojom.h includes with .mojom-forward.h in //chrome/browser (3/n)

This CL replaces .mojom.h includes with .mojom-forward.h in some
sub-directories of chrome/browser to reduce the pre-processed size
of header files and shorter build time. The sub-directories are following,

  - chrome/browser/resource_coordinator
  - chrome/browser/safe_browsing
  - chrome/browser/serial
  - chrome/browser/signin

This CL has no behavior changes.

Bug: 1001360
Change-Id: I58cff9508b8dca43563b92399b77921374445740
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2071676
Commit-Queue: Gyuyoung Kim <gyuyoung@igalia.com>
Reviewed-by: Colin Blundell <blundell@chromium.org>
Cr-Commit-Position: refs/heads/master@{#744266}
12 files changed