[libfuzzer] improving gfx_png_image_fuzzer

testing/libfuzzer/fuzzers/BUILD.gn

 # 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.
 
 # Individual libfuzzer tests that didn't find their home yet.
 
 import("//build/config/features.gni")
 import("//media/media_options.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 
@@ skipping 141 matching lines @@
 }
 
 fuzzer_test("gfx_png_image_fuzzer") {
   sources = [
     "gfx_png_image_fuzzer.cc",
   ]
   deps = [
     "//base",
     "//ui/gfx",
   ]
+  dict = "dicts/png.dict"
 }
 
 fuzzer_test("zlib_uncompress_fuzzer") {
   sources = [
     "zlib_uncompress_fuzzer.cc",
   ]
   deps = [
     "//third_party/zlib",
   ]
 }
@@ skipping 103 matching lines @@
 fuzzer_test("libxml_xml_regexp_compile_fuzzer") {
   sources = [
     "libxml_xml_regexp_compile_fuzzer.cc",
   ]
   deps = [
     "//third_party/libxml",
   ]
   libfuzzer_options = "libxml_xml_regexp_compile_fuzzer.options"
   additional_configs = [ "//testing/libfuzzer:no_clusterfuzz" ]
 }