Add more seed corpus for blink_png_decoder_fuzzer.

third_party/WebKit/Source/platform/BUILD.gn

 # Copyright 2014 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/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 import("//testing/test.gni")
 import("//third_party/WebKit/public/public_features.gni")
 import("//third_party/WebKit/Source/build/scripts/scripts.gni")
@@ skipping 2039 matching lines @@
 fuzzer_test("blink_png_decoder_fuzzer") {
   sources = [
     "PngFuzzer.cpp",
   ]
   deps = [
     ":blink_fuzzer_test_support",
     ":platform",
     "//third_party/libpng",
   ]
   dict = "//testing/libfuzzer/fuzzers/dicts/png.dict"
-  seed_corpus = "//third_party/WebKit/LayoutTests/images/resources/pngfuzz"
+  seed_corpuses = [
+    "//cc/test/data",
+    "//third_party/WebKit/LayoutTests/images/png-suite/samples",
+    "//third_party/WebKit/LayoutTests/images/resources/pngfuzz",
+  ]
 }
 
 # Fuzzer for blink::JSONParser.
 fuzzer_test("blink_json_parser_fuzzer") {
   sources = [
     "json/JSONParserFuzzer.cpp",
   ]
   deps = [
     ":blink_fuzzer_test_support",
     ":platform",
@@ skipping 40 matching lines @@
     "//third_party/WebKit/Source:config",
     "//third_party/WebKit/Source:inside_blink",
   ]
 
   deps = [
     ":test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }