[libfuzzer] Delete Text to Speech Fuzzer

Fuzzer is causing flakiness in CQ.
It can be added back if build issues are fixed.

Bug: 1028212
Change-Id: I45e764e20af1cbc59763cff32f4d379d67b47278
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2142589Reviewed-by: Max Moroz <mmoroz@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#758869}

content/browser/speech/tts_platform_fuzzer.cc

-// Copyright 2018 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 "base/bind.h"
-#include "build/build_config.h"
-#include "content/public/browser/tts_platform.h"
-
-#if defined(OS_WIN)
-#include <objbase.h>
-#endif
-
-namespace content {
-
-// Entry point for LibFuzzer.
-extern "C" int LLVMFuzzerTestOneInput(const unsigned char* data, size_t size) {
-  int utterance_id = 0;
-  std::string utterance;
-  std::string lang;
-  VoiceData voice;
-  UtteranceContinuousParameters params;
-  params.pitch = 1.0;
-  params.rate = 1.0;
-  params.volume = 0.1;
-
-#if defined(OS_WIN)
-  static bool initialized = false;
-  if (!initialized) {
-    initialized = true;
-    CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED);
-  }
-#endif
-
-  // First byte gives us the utterance ID.
-  size_t i = 0;
-  if (i < size)
-    utterance_id = data[i++];
-
-  // Decide whether we want to fuzz the language, rate, pitch,
-  // voice name, and all that. Half the time we'll just leave
-  // those empty and fuzz only the utterance, otherwise it's
-  // possible the fuzzer would never spend any effort fuzzing
-  // utteranes.
-  if (i < size && (data[i++] % 2 == 0)) {
-    // The next few bytes determine the language. Ensure that
-    // we frequently get some common real languages but allow
-    // arbitrary strings up to 10 characters.
-    if (i < size) {
-      int lang_choice = data[i++];
-      switch (lang_choice) {
-        case 0:
-          lang = "";
-          break;
-        case 1:
-          lang = "en";
-          break;
-        case 2:
-          lang = "fr";
-          break;
-        case 3:
-          lang = "es";
-          break;
-        default:
-          int lang_len = 1 + (lang_choice - 4) % 10;
-          for (int j = 0; j < lang_len; j++) {
-            if (i < size)
-              lang.append(1, data[i++]);
-          }
-      }
-    }
-
-    // Set native_voice_identifier
-    if (i < size) {
-      int voice_len = data[i++] % 10;
-      for (int j = 0; j < voice_len; j++) {
-        if (i < size)
-          voice.native_voice_identifier.append(1, data[i++]);
-      }
-    }
-
-    // Set rate, pitch.
-    if (i + 4 <= size) {
-      params.rate = *reinterpret_cast<const float*>(&data[i]);
-      i += 4;
-    }
-    if (i + 4 <= size) {
-      params.pitch = *reinterpret_cast<const float*>(&data[i]);
-      i += 4;
-    }
-  }
-
-  // The rest of the data becomes the utterance.
-  while (i < size)
-    utterance.append(1, data[i++]);
-
-  TtsPlatform* tts = TtsPlatform::GetInstance();
-  CHECK(tts->PlatformImplAvailable());
-
-  VLOG(1) << "id=" << utterance_id << " lang='" << lang << "'"
-          << " voice='" << voice.native_voice_identifier << "'"
-          << " pitch=" << params.pitch << " rate=" << params.rate
-          << " volume=" << params.volume << " utterance='" << utterance << "'";
-
-  tts->StopSpeaking();
-  tts->Speak(utterance_id, utterance, lang, voice, params,
-             base::BindOnce([](bool success) {}));
-
-  return 0;
-}
-
-}  // namespace content

content/test/fuzzer/BUILD.gn

@@ -161,42 +161,6 @@ fuzzer_test("appcache_fuzzer") {
   ]
 }
 
-# Note: this compiles and runs on Mac but may cause
-# system instability; if you try it out, close other
-# programs and then reboot afterwards. It should be
-# possible to make it work on Linux if you use the
-# --enable-speech-dispatcher flag.
-if (is_win) {
-  fuzzer_test("tts_platform_fuzzer") {
-    sources = [
-      "../../browser/speech/mock_tts_controller.cc",
-      "../../browser/speech/tts_mac.mm",
-      "../../browser/speech/tts_platform_fuzzer.cc",
-      "../../browser/speech/tts_platform_impl.cc",
-      "../../browser/speech/tts_platform_impl.h",
-      "../../browser/speech/tts_win.cc",
-      "../../public/browser/tts_controller.h",
-      "../../public/browser/tts_platform.h",
-      "//content/common/content_export.h",
-    ]
-
-    # Don't try to link the code that calls GetContentClient(), because
-    # then we'd need to link in most of //content.
-    defines = [ "NO_CONTENT_CLIENT" ]
-
-    # TODO(https://crbug.com/927728): Refactor target to not require this.
-    check_includes = false
-
-    deps = [
-      "//base",
-      "//base/test:test_support",
-      "//third_party/webrtc_overrides:webrtc_component",
-      "//ui/base",
-      "//url:url",
-    ]
-  }
-}
-
 fuzzer_test("speech_audio_encoder_fuzzer") {
   sources = [
     "../../browser/speech/audio_buffer.cc",