Add a fuzzer for the Origin Trial token parser

content/test/fuzzer/BUILD.gn

Index: content/test/fuzzer/BUILD.gn
diff --git a/content/test/fuzzer/BUILD.gn b/content/test/fuzzer/BUILD.gn
index d564f3031ecbe89643a86ffea8fef02f780e38b5..4222577ca615d7b6ba2a162d78ff99c4e586a563 100644
--- a/content/test/fuzzer/BUILD.gn
+++ b/content/test/fuzzer/BUILD.gn
@@ -26,6 +26,18 @@ if (!is_component_build) {
     testonly = true
   }
 
+  fuzzer_test("origin_trial_token_fuzzer") {
+    sources = [
+      "origin_trial_token_fuzzer.cc",
+    ]
+    deps = [
+      ":fuzzer_support",
+    ]
+    dict =
+        "//content/test/data/fuzzer_dictionaries/origin_trial_token_fuzzer.dict"
+    seed_corpus = "//content/test/data/fuzzer_corpus/origin_trial_token_data/"
+  }
+
   fuzzer_test("renderer_fuzzer") {
     sources = [
       "renderer_fuzzer.cc",