Enable "gn check" for //third_party/blink/renderer/modules/accessibility

- This directory depends on html/parser:parser, which is a part of
  "core", but "core" didn't expose it.

This CL has no behavior changes.

Bug: 800764
Change-Id: I54c621d93b0fc3959197d88ec7363f2670060e51
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2397456
Auto-Submit: Kent Tamura <tkent@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804867}

.gn

@@ -252,7 +252,6 @@ no_check_targets = [
   "//third_party/blink/renderer/core/workers:*",  # 289 errors
   "//third_party/blink/renderer/core/xmlhttprequest:*",  # 49 errors
   "//third_party/blink/renderer/core:*",  # 823 errors
-  "//third_party/blink/renderer/modules/accessibility:*",  # 7 errors
   "//third_party/blink/renderer/modules/animationworklet:*",  # 1 error
   "//third_party/blink/renderer/modules/background_fetch:*",  # 4 errors
   "//third_party/blink/renderer/modules/cache_storage:*",  # 3 errors

third_party/blink/renderer/core/BUILD.gn

@@ -160,6 +160,7 @@ component("core") {
     "//third_party/blink/renderer/core/fullscreen",
     "//third_party/blink/renderer/core/geometry",
     "//third_party/blink/renderer/core/html",
+    "//third_party/blink/renderer/core/html/parser:parser",
     "//third_party/blink/renderer/core/imagebitmap",
     "//third_party/blink/renderer/core/input",
     "//third_party/blink/renderer/core/inspector",

third_party/blink/renderer/modules/accessibility/BUILD.gn

@@ -65,6 +65,9 @@ blink_modules_sources("accessibility") {
   ]
 
   deps = [
+    "//third_party/blink/public/strings:strings_grit",
+    "//third_party/blink/renderer/modules/media_controls:media_controls",
+    "//third_party/blink/renderer/modules/permissions:permissions",
     "//ui/accessibility:ax_base",
     "//ui/accessibility:ax_enums_mojo_blink",
   ]