Add a fuzzer for HttpProxyClientSocket.

net/BUILD.gn

 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import("//build/buildflag_header.gni")
 import("//build/config/chromecast_build.gni")
 import("//build/config/compiler/compiler.gni")
 import("//build/config/crypto.gni")
 import("//build/config/features.gni")
 import("//build/config/ui.gni")
@@ skipping 1954 matching lines @@
   sources = [
     "http/http_chunked_decoder_fuzzer.cc",
   ]
   deps = [
     ":net_fuzzer_test_support",
     "//net",
   ]
   dict = "http/http_chunked_decoder_fuzzer.dict"
 }
 
+fuzzer_test("net_http_proxy_client_socket_fuzzer") {
+  sources = [
+    "http/http_proxy_client_socket_fuzzer.cc",
+  ]
+  deps = [
+    ":net_fuzzer_test_support",
+    ":test_support",
+    "//base",
+    "//net",
+  ]
+}
+
 fuzzer_test("net_quic_crypto_framer_parse_message_fuzzer") {
   sources = [
     "quic/quic_crypto_framer_parse_message_fuzzer.cc",
   ]
   deps = [
     ":net_fuzzer_test_support",
     "//base",
     "//net",
   ]
 }
@@ skipping 14 matching lines @@
   sources = [
     "socket/socks5_client_socket_fuzzer.cc",
   ]
   deps = [
     ":net_fuzzer_test_support",
     ":test_support",
     "//base",
     "//net",
   ]
 }