headless: Merge "headless_renderer" target into "headless_shared_sources"

Derived from tkent's work in https://chromium-review.googlesource.com/c/chromium/src/+/3865941

In order to fix "gn check" errors, this CL moves all dependencies of
headless_content_main_delegate.* to "headless_shared_sources". As the
result, all sources in "headless_(non_)renderer" are moved to
"headless_shared_sources".

Bug: 1158989
Change-Id: I5701a8becada158e8443def7a434b5fd57830491
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4125896
Auto-Submit: Ari Chivukula <[email protected]>
Reviewed-by: Bruce Dawson <[email protected]>
Reviewed-by: Sami Kyöstilä <[email protected]>
Commit-Queue: Ari Chivukula <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1087705}

Author: arichiv

.gn

@@ -68,10 +68,6 @@ default_args = {
 # their includes checked for proper dependencies when you run either
 # "gn check" or "gn gen --check".
 no_check_targets = [
-  # crbug.com/1158989
-  "//headless:headless_renderer",  # 12 errors
-  "//headless:headless_shared_sources",  # 2 errors
-
   # //v8, https://crbug.com/v8/7330
   "//v8/src/inspector:inspector",  # 20 errors
   "//v8/test/cctest:cctest_sources",  # 15 errors

chrome/BUILD.gn

@@ -411,7 +411,7 @@ if (is_win) {
       "//components/policy:generated",
       "//content/public/app",
       "//crypto",
-      "//headless:headless_renderer",
+      "//headless:headless_non_renderer",
       "//headless:headless_shell_browser_lib",
       "//net:net_resources",
       "//ppapi/buildflags",