Change pdf/pdfium/fuzzers/BUILD.gn to use dicts and seed corpora

pdf/pdfium/fuzzers/BUILD.gn

 # Copyright 2016 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.
 
 # PDFium fuzzers.
 
 import("//third_party/pdfium/pdfium.gni")
 import("//testing/test.gni")
 import("//testing/libfuzzer/fuzzer_test.gni")
 
@@ skipping 15 matching lines @@
     "//v8:external_startup_data",
   ]
   dict = "dicts/pdf.dict"
 }
 
 fuzzer_test("pdf_jpx_fuzzer") {
   sources = []
   deps = [
     "//third_party/pdfium/testing/libfuzzer:pdf_jpx_fuzzer",
   ]
+  seed_corpus = "corpora/pdf_jpx"
 }
 
 if (pdf_enable_xfa) {
   fuzzer_test("pdf_codec_bmp_fuzzer") {
     sources = []
     deps = [
       "//third_party/pdfium/testing/libfuzzer:pdf_codec_bmp_fuzzer",
     ]
+    seed_corpus = "corpora/pdf_codec_bmp"
   }
 
   fuzzer_test("pdf_codec_gif_fuzzer") {
     sources = []
     deps = [
       "//third_party/pdfium/testing/libfuzzer:pdf_codec_gif_fuzzer",
     ]
+    dict = "dicts/pdf_codec_gif.dict"
+    seed_corpus = "corpora/pdf_codec_gif"
   }
 
   fuzzer_test("pdf_codec_jpeg_fuzzer") {
     sources = []
     deps = [
       "//third_party/pdfium/testing/libfuzzer:pdf_codec_jpeg_fuzzer",
     ]
+    dict = "dicts/pdf_codec_jpeg.dict"
+    seed_corpus = "corpora/pdf_codec_jpeg"
   }
 
   fuzzer_test("pdf_codec_png_fuzzer") {
     sources = []
     deps = [
       "//third_party/pdfium/testing/libfuzzer:pdf_codec_png_fuzzer",
     ]
+    dict = "dicts/pdf_codec_png.dict"
+    seed_corpus = "corpora/pdf_codec_png"
   }
 
   fuzzer_test("pdf_codec_tiff_fuzzer") {
     sources = []
     deps = [
       "//third_party/pdfium/testing/libfuzzer:pdf_codec_tiff_fuzzer",
     ]
+    dict = "dicts/pdf_codec_tiff.dict"
+    seed_corpus = "corpora/pdf_codec_tiff"
   }
 
   fuzzer_test("pdf_css_fuzzer") {
     sources = []
     deps = [
       "//third_party/pdfium/testing/libfuzzer:pdf_css_fuzzer",
     ]
     dict = "dicts/pdf_css.dict"
   }
 
@@ skipping 14 matching lines @@
   }
 
   fuzzer_test("pdf_cfx_saxreader_fuzzer") {
     sources = []
     deps = [
       "//third_party/pdfium/testing/libfuzzer:pdf_cfx_saxreader_fuzzer",
     ]
     dict = "dicts/pdf_xml.dict"
   }
 }