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

- It has a circular dependency with modules/worklet:worklet.
  The dependency is safe because these targets are in a single library.

This CL has no behavior changes.

Bug: 800764
Change-Id: Id77e8c276ff74e6802e6ce7b2323cead37e6862b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2397475
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Auto-Submit: Kent Tamura <tkent@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804892}

.gn

@@ -256,7 +256,6 @@ no_check_targets = [
   "//third_party/blink/renderer/modules/background_fetch:*",  # 4 errors
   "//third_party/blink/renderer/modules/cache_storage:*",  # 3 errors
   "//third_party/blink/renderer/modules/canvas:*",  # 1 error
-  "//third_party/blink/renderer/modules/csspaint:*",  # 2 errors
   "//third_party/blink/renderer/modules/font_access:*",  # 3 errors
   "//third_party/blink/renderer/modules/imagecapture:*",  # 2 errors
   "//third_party/blink/renderer/modules/manifest:*",  # 2 errors

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

@@ -30,4 +30,6 @@ blink_modules_sources("csspaint") {
     "paint_worklet_proxy_client.cc",
     "paint_worklet_proxy_client.h",
   ]
+
+  public_deps = [ "//third_party/blink/renderer/modules/canvas:canvas" ]
 }

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

@@ -13,4 +13,6 @@ blink_modules_sources("worklet") {
     "//third_party/blink/renderer/modules/animationworklet",
     "//third_party/blink/renderer/modules/csspaint",
   ]
+  allow_circular_includes_from =
+      [ "//third_party/blink/renderer/modules/csspaint:csspaint" ]
 }