Replace .mojom.h includes with .mojom-forward.h in //chrome/browser (1/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/optimization_guide
  - chrome/browser/page_load_metrics
  - chrome/browser/password_manager
  - chrome/browser/payments
  - chrome/browser/performance_manager
  - chrome/browser/permissions
  - chrome/browser/predictors

This CL has no behavior changes.

Bug: 1001360
Change-Id: I8ba85e662854c2c0378c9499169b799c204a2dc7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2060028
Reviewed-by: Colin Blundell <blundell@chromium.org>
Commit-Queue: Gyuyoung Kim <gyuyoung@igalia.com>
Cr-Commit-Position: refs/heads/master@{#742442}
16 files changed