Add a seed corpus for the compact_enc_det fuzzer.

Also resolve a couple of post-submit comments from adding the fuzzer.

BUG=None

Change-Id: I3327e4282903907bd6b1cc8df133fe076398ee59
Reviewed-on: https://chromium-review.googlesource.com/c/1345372
Commit-Queue: Anand Mistry <amistry@chromium.org>
Reviewed-by: Max Moroz <mmoroz@chromium.org>
Reviewed-by: Jungshik Shin <jshin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#610524}

third_party/ced/BUILD.gn

@@ -2,8 +2,8 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import("//testing/test.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
+import("//testing/test.gni")
 
 config("ced_config") {
   include_dirs = [ "src" ]
@@ -106,4 +106,5 @@ fuzzer_test("compact_enc_det_fuzzer") {
     ":ced",
     "//base/test:test_support",
   ]
+  seed_corpus = "compact_enc_det_corpus"
 }

third_party/ced/compact_enc_det_corpus/ar_en_windows_1256.txt

+The quick brown fox jumps over the lazy dog.
+      .
+The quick brown fox jumps over the lazy dog.
+      .
+The quick brown fox jumps over the lazy dog.
+      .
+The quick brown fox jumps over the lazy dog.
+      .
+The quick brown fox jumps over the lazy dog.
+      .

third_party/ced/compact_enc_det_corpus/english_ascii.txt

+The quick brown fox jumps over the lazy dog.
+The quick brown fox jumps over the lazy dog.
+The quick brown fox jumps over the lazy dog.
+The quick brown fox jumps over the lazy dog.
+The quick brown fox jumps over the lazy dog.
+The quick brown fox jumps over the lazy dog.
+The quick brown fox jumps over the lazy dog.
+The quick brown fox jumps over the lazy dog.
+The quick brown fox jumps over the lazy dog.
+The quick brown fox jumps over the lazy dog.

third_party/ced/compact_enc_det_corpus/french_ascii.txt

+Le renard brun rapide saute par-dessus le chien paresseux.
+Le renard brun rapide saute par-dessus le chien paresseux.
+Le renard brun rapide saute par-dessus le chien paresseux.
+Le renard brun rapide saute par-dessus le chien paresseux.
+Le renard brun rapide saute par-dessus le chien paresseux.
+Le renard brun rapide saute par-dessus le chien paresseux.
+Le renard brun rapide saute par-dessus le chien paresseux.
+Le renard brun rapide saute par-dessus le chien paresseux.
+Le renard brun rapide saute par-dessus le chien paresseux.
+Le renard brun rapide saute par-dessus le chien paresseux.

third_party/ced/compact_enc_det_corpus/greek_iso8859_7.txt

+         .
+         .
+         .
+         .
+         .
+         .
+         .
+         .
+         .
+         .

third_party/ced/compact_enc_det_corpus/greek_utf8.txt

+Η γρήγορη καφέ αλεπού πηδάει πάνω από το τεμπέλικο σκυλί.
+Η γρήγορη καφέ αλεπού πηδάει πάνω από το τεμπέλικο σκυλί.
+Η γρήγορη καφέ αλεπού πηδάει πάνω από το τεμπέλικο σκυλί.
+Η γρήγορη καφέ αλεπού πηδάει πάνω από το τεμπέλικο σκυλί.
+Η γρήγορη καφέ αλεπού πηδάει πάνω από το τεμπέλικο σκυλί.
+Η γρήγορη καφέ αλεπού πηδάει πάνω από το τεμπέλικο σκυλί.
+Η γρήγορη καφέ αλεπού πηδάει πάνω από το τεμπέλικο σκυλί.
+Η γρήγορη καφέ αλεπού πηδάει πάνω από το τεμπέλικο σκυλί.
+Η γρήγορη καφέ αλεπού πηδάει πάνω από το τεμπέλικο σκυλί.
+Η γρήγορη καφέ αλεπού πηδάει πάνω από το τεμπέλικο σκυλί.

third_party/ced/compact_enc_det_corpus/he_en_windows_1255.txt

+The quick brown fox jumps over the lazy dog.
+      .
+The quick brown fox jumps over the lazy dog.
+      .
+The quick brown fox jumps over the lazy dog.
+      .
+The quick brown fox jumps over the lazy dog.
+      .
+The quick brown fox jumps over the lazy dog.
+      .

third_party/ced/compact_enc_det_corpus/japanese_shift_jis.txt

+クイックブラウンキツネは怠惰な犬の上を飛びます。
+クイックブラウンキツネは怠惰な犬の上を飛びます。
+クイックブラウンキツネは怠惰な犬の上を飛びます。
+クイックブラウンキツネは怠惰な犬の上を飛びます。
+クイックブラウンキツネは怠惰な犬の上を飛びます。
+クイックブラウンキツネは怠惰な犬の上を飛びます。
+クイックブラウンキツネは怠惰な犬の上を飛びます。
+クイックブラウンキツネは怠惰な犬の上を飛びます。
+クイックブラウンキツネは怠惰な犬の上を飛びます。
+クイックブラウンキツネは怠惰な犬の上を飛びます。

third_party/ced/compact_enc_det_corpus/japanese_utf16le.txt

 クイックブラウンキツネは怠惰な犬の上を飛びます。

third_party/ced/compact_enc_det_corpus/jp_en_iso2022_jp.txt

+The quick brown fox jumps over the lazy dog.
+$B%/%$%C%/%V%i%&%s%-%D%M$OBUBF$J8$$N>e$rHt$S$^$9!#(B
+The quick brown fox jumps over the lazy dog.
+$B%/%$%C%/%V%i%&%s%-%D%M$OBUBF$J8$$N>e$rHt$S$^$9!#(B
+The quick brown fox jumps over the lazy dog.
+$B%/%$%C%/%V%i%&%s%-%D%M$OBUBF$J8$$N>e$rHt$S$^$9!#(B
+The quick brown fox jumps over the lazy dog.
+$B%/%$%C%/%V%i%&%s%-%D%M$OBUBF$J8$$N>e$rHt$S$^$9!#(B
+The quick brown fox jumps over the lazy dog.
+$B%/%$%C%/%V%i%&%s%-%D%M$OBUBF$J8$$N>e$rHt$S$^$9!#(B
+

third_party/ced/compact_enc_det_corpus/kr_en_euc_kr.txt

+The quick brown fox jumps over the lazy dog.
+빠른 갈색 여우는 게으른 개를 뛰어 넘습니다.
+The quick brown fox jumps over the lazy dog.
+빠른 갈색 여우는 게으른 개를 뛰어 넘습니다.
+The quick brown fox jumps over the lazy dog.
+빠른 갈색 여우는 게으른 개를 뛰어 넘습니다.
+The quick brown fox jumps over the lazy dog.
+빠른 갈색 여우는 게으른 개를 뛰어 넘습니다.
+The quick brown fox jumps over the lazy dog.
+빠른 갈색 여우는 게으른 개를 뛰어 넘습니다.

third_party/ced/compact_enc_det_corpus/ru_en_koi8_r.txt

+The quick brown fox jumps over the lazy dog.
+      .
+The quick brown fox jumps over the lazy dog.
+      .
+The quick brown fox jumps over the lazy dog.
+      .
+The quick brown fox jumps over the lazy dog.
+      .
+The quick brown fox jumps over the lazy dog.
+      .

third_party/ced/compact_enc_det_corpus/spanish_iso8859_1.txt

+El zorro marrón rápido salta sobre el perro perezoso.
+El zorro marrón rápido salta sobre el perro perezoso.
+El zorro marrón rápido salta sobre el perro perezoso.
+El zorro marrón rápido salta sobre el perro perezoso.
+El zorro marrón rápido salta sobre el perro perezoso.
+El zorro marrón rápido salta sobre el perro perezoso.
+El zorro marrón rápido salta sobre el perro perezoso.
+El zorro marrón rápido salta sobre el perro perezoso.
+El zorro marrón rápido salta sobre el perro perezoso.
+El zorro marrón rápido salta sobre el perro perezoso.

third_party/ced/compact_enc_det_corpus/th_en_tis_620.txt

+The quick brown fox jumps over the lazy dog.
+Ҩ駨͡չӵšⴴҢ¨
+The quick brown fox jumps over the lazy dog.
+Ҩ駨͡չӵšⴴҢ¨
+The quick brown fox jumps over the lazy dog.
+Ҩ駨͡չӵšⴴҢ¨
+The quick brown fox jumps over the lazy dog.
+Ҩ駨͡չӵšⴴҢ¨
+The quick brown fox jumps over the lazy dog.
+Ҩ駨͡չӵšⴴҢ¨

third_party/ced/compact_enc_det_corpus/vi_en_windows_1258.txt

+The very quick brown fox jumps over the lazy dog.
+Con co mu nu rt nhanh chng nhay qua con ch li.
+The very quick brown fox jumps over the lazy dog.
+Con co mu nu rt nhanh chng nhay qua con ch li.
+The very quick brown fox jumps over the lazy dog.
+Con co mu nu rt nhanh chng nhay qua con ch li.
+The very quick brown fox jumps over the lazy dog.
+Con co mu nu rt nhanh chng nhay qua con ch li.
+The very quick brown fox jumps over the lazy dog.
+Con co mu nu rt nhanh chng nhay qua con ch li.

third_party/ced/compact_enc_det_corpus/zh_en_big5.txt

+The quick brown fox jumps over the lazy dog.
+敏捷的棕色狐狸跳過了懶狗。
+The quick brown fox jumps over the lazy dog.
+敏捷的棕色狐狸跳過了懶狗。
+The quick brown fox jumps over the lazy dog.
+敏捷的棕色狐狸跳過了懶狗。
+The quick brown fox jumps over the lazy dog.
+敏捷的棕色狐狸跳過了懶狗。
+The quick brown fox jumps over the lazy dog.
+敏捷的棕色狐狸跳過了懶狗。

third_party/ced/compact_enc_det_corpus/zh_en_gbk.txt

+The quick brown fox jumps over the lazy dog.
+敏捷的棕色狐狸跳过了懒狗。
+The quick brown fox jumps over the lazy dog.
+敏捷的棕色狐狸跳过了懒狗。
+The quick brown fox jumps over the lazy dog.
+敏捷的棕色狐狸跳过了懒狗。
+The quick brown fox jumps over the lazy dog.
+敏捷的棕色狐狸跳过了懒狗。
+The quick brown fox jumps over the lazy dog.
+敏捷的棕色狐狸跳过了懒狗。
+

third_party/ced/compact_enc_det_fuzzer.cc

@@ -12,6 +12,11 @@
 
 
 extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  // Early out if there isn't enough data to extract options and pass data to
+  // the library.
+  if (size < 3 * sizeof(int32_t) + 1)
+    return 0;
+
   base::FuzzedDataProvider data_provider(data, size);
 
   CompactEncDet::TextCorpusType corpus =