Add Expect-CT header parsing

net/BUILD.gn

Index: net/BUILD.gn
diff --git a/net/BUILD.gn b/net/BUILD.gn
index 36c0fa441d285835c5cf00d3710aa55e8611f708..d1863850ad8b6ad757a3dee00238b3344e28308e 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -5706,6 +5706,20 @@ fuzzer_test("net_auth_challenge_tokenizer_fuzzer") {
   ]
 }
 
+fuzzer_test("net_http_security_headers_expect_ct_fuzzer") {
+  sources = [
+    "http/http_security_headers_expect_ct_fuzzer.cc",
+  ]
+  deps = [
+    ":net_fuzzer_test_support",
+    "//base",
+    "//net",
+    "//url",
+  ]
+  dict = "data/fuzzer_dictionaries/net_http_security_headers_fuzzer.dict"
+  seed_corpus = "data/fuzzer_data/http_security_headers/"
+}
+
 fuzzer_test("net_http_security_headers_hsts_fuzzer") {
   sources = [
     "http/http_security_headers_hsts_fuzzer.cc",
@@ -5715,6 +5729,7 @@ fuzzer_test("net_http_security_headers_hsts_fuzzer") {
     "//net",
   ]
   dict = "data/fuzzer_dictionaries/net_http_security_headers_fuzzer.dict"
+  seed_corpus = "data/fuzzer_data/http_security_headers/"
 }
 
 fuzzer_test("net_http_security_headers_hpkp_fuzzer") {
@@ -5728,6 +5743,7 @@ fuzzer_test("net_http_security_headers_hpkp_fuzzer") {
     "//url",
   ]
   dict = "data/fuzzer_dictionaries/net_http_security_headers_fuzzer.dict"
+  seed_corpus = "data/fuzzer_data/http_security_headers/"
 }
 
 fuzzer_test("net_http_security_headers_hpkp_report_only_fuzzer") {