URLRequest fuzzer.

net/BUILD.gn

Index: net/BUILD.gn
diff --git a/net/BUILD.gn b/net/BUILD.gn
index 0e2823980b23256535a14fbc8588c173fa434f07..8e45a78b95fd4f40581bd1c832c1cef3ca100f09 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -1790,9 +1790,13 @@ source_set("net_fuzzer_test_support") {
   testonly = true
 
   sources = [
+    "base/fuzzed_data_provider.cc",
+    "base/fuzzed_data_provider.h",
     "base/fuzzer_test_support.cc",
     "socket/fuzzed_socket.cc",
     "socket/fuzzed_socket.h",
+    "socket/fuzzed_socket_factory.cc",
+    "socket/fuzzed_socket_factory.h",
   ]
   deps = [
     "//base",
@@ -2021,3 +2025,15 @@ fuzzer_test("net_socks5_client_socket_fuzzer") {
     "//net",
   ]
 }
+
+fuzzer_test("net_url_request_fuzzer") {
+  sources = [
+    "url_request/url_request_fuzzer.cc",
+  ]
+  deps = [
+    ":net_fuzzer_test_support",
+    ":test_support",
+    "//base",
+    "//net",
+  ]
+}