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

- Add missing dependencies

This CL has no behavior changes.

Bug: 800764
Change-Id: Ic06fcadb52cb5be6ead04830223f33d0a6ed5160
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2409552
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
Auto-Submit: Kent Tamura <tkent@chromium.org>
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Cr-Commit-Position: refs/heads/master@{#806859}

.gn

@@ -250,7 +250,6 @@ 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/canvas:*",  # 1 error
   "//third_party/blink/renderer/modules/font_access:*",  # 3 errors
   "//third_party/blink/renderer/modules/peerconnection:*",  # 43 errors
 

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

@@ -48,6 +48,9 @@ fuzzer_test("canvas_fuzzer") {
   seed_corpuses = [ "//third_party/blink/web_tests/fast/canvas" ]
   deps = [
     "../../platform:blink_fuzzer_test_support",
+    "//base/test:test_support",
     "//third_party/blink/renderer/core",
+    "//third_party/blink/renderer/core:testing",
+    "//third_party/blink/renderer/platform:test_support",
   ]
 }