Properly disabling canvas fuzzer

Temporarily disabling canvas fuzzer to further investigate some false
positives and a time out.

Bug: 1124824, 1128300, 1124812
Change-Id: Ib3a186f3695fedf86bed9f57b77c2dcd583c7e85
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2410287
Commit-Queue: Juanmi Huertas <juanmihd@chromium.org>
Reviewed-by: Fernando Serboncini <fserb@chromium.org>
Reviewed-by: Abhishek Arya <inferno@chromium.org>
Cr-Commit-Position: refs/heads/master@{#807299}

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

@@ -53,4 +53,7 @@ fuzzer_test("canvas_fuzzer") {
     "//third_party/blink/renderer/core:testing",
     "//third_party/blink/renderer/platform:test_support",
   ]
+
+  # Disabled due to many false positives (crbug.com/1124824).
+  additional_configs = [ "//testing/libfuzzer:no_clusterfuzz" ]
 }

third_party/blink/renderer/modules/canvas/canvas_fuzzer.cc

@@ -81,10 +81,6 @@ class PageHelper {
 
 // Fuzzer for blink::ManifestParser
 int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-  // TODO(bug/1124824) Disabling CanvasFuzzer as it seems to be producing lots
-  // of false positives.
-  return 0;
-
   // We are ignoring small tests
   constexpr int minSizeHtml = 20;
   if (size < minSizeHtml)