GitLab

Extract chrome api sources from chrome/common/extensions/api/BUILD.gn
to a separate gni file at chrome/common/extensions/api/api_soruces.
This allows us to pull the api registration step of generation out
from chrome/common and into chrome/browser. This is helpful, since it
is a purely-browser dependency (and has browser dependencies itself).

Also make this step a public dependency of chrome/browser/extensions so
embedders do not need to explicitly depend on it themselves.

Bug: None

Change-Id: I6f2f973a5ba1c04b01aa36b096de847b73964148
Reviewed-on: https://chromium-review.googlesource.com/1139394
Commit-Queue: Devlin <rdevlin.cronin@chromium.org>
Reviewed-by: Istiaque Ahmed <lazyboy@chromium.org>
Cr-Commit-Position: refs/heads/master@{#575895}