Revert of [libfuzzer] proto-based renderer fuzzer draft

content/test/fuzzer/renderer_proto_tree_fuzzer.cc

-// Copyright 2017 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.
-
-// Fuzzer for content/renderer
-
-#include <stddef.h>
-#include <stdint.h>
-#include <memory>
-#include <sstream>
-
-#include "content/test/fuzzer/fuzzer_support.h"
-#include "content/test/fuzzer/html_tree.pb.h"
-#include "third_party/libprotobuf-mutator/src/src/binary_format.h"
-#include "third_party/libprotobuf-mutator/src/src/libfuzzer/libfuzzer_mutator.h"
-
-protobuf_mutator::protobuf::LogSilencer log_silincer;
-
-namespace content {
-
-class HtmlTreeWriter {
- public:
-  HtmlTreeWriter() {}
-
-  template <typename T>
-  HtmlTreeWriter& operator<<(const T& t) {
-    out_ << t;
-    return *this;
-  }
-
-  std::string str() const { return out_.str(); }
-
- private:
-  std::ostringstream out_;
-};
-
-static HtmlTreeWriter& operator<<(HtmlTreeWriter& w,
-                                  const Attribute::Value& value) {
-  switch (value.value_case()) {
-    case Attribute::Value::kBoolValue:
-      return w << (value.bool_value() ? "true" : "false");
-    case Attribute::Value::kUintValue:
-      return w << value.uint_value();
-    case Attribute::Value::kIntValue:
-      return w << value.int_value();
-    case Attribute::Value::kDoubleValue:
-      return w << value.double_value();
-    case Attribute::Value::kPxValue:
-      return w << value.px_value() << "px";
-    case Attribute::Value::kPctValue:
-      return w << value.pct_value() << "%";
-    case Attribute::Value::VALUE_NOT_SET:
-      return w;
-  }
-}
-
-static HtmlTreeWriter& operator<<(HtmlTreeWriter& w,
-                                  const Attribute::Name& name) {
-  return w << Attribute_Name_Name(name);
-}
-
-static HtmlTreeWriter& operator<<(HtmlTreeWriter& w, const Attribute& attr) {
-  return w << attr.name() << "=\"" << attr.value() << "\"";
-}
-
-static HtmlTreeWriter& operator<<(HtmlTreeWriter& w, const Tag::Name& tagName) {
-  return w << Tag_Name_Name(tagName);
-}
-
-static void operator<<(HtmlTreeWriter& w, const Tag& tag) {
-  w << "<" << tag.name();
-  for (const auto& attr : tag.attrs()) {
-    w << " " << attr;
-  }
-
-  w << ">";
-  for (const auto& subtag : tag.subtags()) {
-    w << subtag;
-  }
-  w << "</" << tag.name() << ">";
-}
-
-static void operator<<(HtmlTreeWriter& w, const Document& document) {
-  w << document.root();
-}
-
-static std::string str(const uint8_t* data, size_t size) {
-  Document document;
-  protobuf_mutator::ParseBinaryMessage(data, size, &document);
-
-  HtmlTreeWriter writer;
-  writer << document;
-  return writer.str();
-  //  return document.ShortDebugString();
-}
-
-extern "C" void LLVMPrintInput(const uint8_t* data, size_t size) {
-  //  fprintf(stderr, "NEW %s\n", str(data, size).c_str());
-}
-
-extern "C" size_t LLVMFuzzerCustomMutator(uint8_t* data,
-                                          size_t size,
-                                          size_t max_size,
-                                          unsigned int seed) {
-  fprintf(stderr, "BEFORE    %s\n", str(data, size).c_str());
-  size_t new_size = protobuf_mutator::libfuzzer::MutateBinaryMessage<Document>(
-      data, size, max_size, seed);
-  fprintf(stderr, "AFTER     %s\n", str(data, new_size).c_str());
-  return new_size;
-}
-
-extern "C" size_t LLVMFuzzerCustomCrossOver(const uint8_t* data1,
-                                            size_t size1,
-                                            const uint8_t* data2,
-                                            size_t size2,
-                                            uint8_t* out,
-                                            size_t max_out_size,
-                                            unsigned int seed) {
-  fprintf(stderr, "BEFOR1    %s\n", str(data1, size1).c_str());
-  fprintf(stderr, "BEFOR2    %s\n", str(data2, size2).c_str());
-  size_t new_size =
-      protobuf_mutator::libfuzzer::CrossOverBinaryMessages<Document>(
-          data1, size1, data2, size2, out, max_out_size, seed);
-  fprintf(stderr, "AFTER     %s\n", str(data1, new_size).c_str());
-  return new_size;
-}
-
-static Env* env = nullptr;
-
-extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
-  // Environment has to be initialized in the same thread.
-  if (env == nullptr)
-    env = new Env();
-
-  //  str(data, size);
-
-  env->adapter->LoadHTML(str(data, size), "http://www.example.org");
-
-  //  fprintf(stderr, "%s\n", writer.str().c_str());
-
-  return 0;
-}
-
-}  // namespace content