Move network fuzzers from //testing/libfuzzer/fuzzers to //net

net/websockets/websocket_frame_parser_fuzzer.cc

 // Copyright 2015 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.
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <vector>
 
 #include "net/websockets/websocket_frame_parser.h"
 
 // Entry point for LibFuzzer.
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   net::WebSocketFrameParser parser;
   std::vector<scoped_ptr<net::WebSocketFrameChunk>> frame_chunks;
   parser.Decode(reinterpret_cast<const char*>(data), size, &frame_chunks);
 
   return 0;
 }