[libfuzzer] Added script for dictionary generation.

net/BUILD.gn

Index: net/BUILD.gn
diff --git a/net/BUILD.gn b/net/BUILD.gn
index 617cd80d23bcd84eed3398a2193f693468dc35f4..2972664a530182948b25ebb54a1c97d57d4757f5 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -1967,7 +1967,7 @@ fuzzer_test("net_http_stream_parser_fuzzer") {
     "//base",
     "//net",
   ]
-  dict = "data/http/http.dict"
+  dict = "//testing/libfuzzer/fuzzers/dicts/generated/net_http_stream_parser_fuzzer.dict"

[inferno, 2016/07/04 00:21:55]

we should probably prefer to keep these dicts next to the code unittest dirs. in
this case probably data/dicts/generated

[mmoroz, 2016/07/06 15:06:18]

Done.

 }
 
 fuzzer_test("net_ftp_ctrl_response_fuzzer") {
@@ -2013,6 +2013,7 @@ fuzzer_test("net_websocket_frame_parser_fuzzer") {
     ":net_fuzzer_test_support",
     "//net",
   ]
+  dict = "//testing/libfuzzer/fuzzers/dicts/generated/net_websocket_frame_parser_fuzzer.dict"
 }
 
 fuzzer_test("net_http_chunked_decoder_fuzzer") {
@@ -2036,7 +2037,7 @@ fuzzer_test("net_http_proxy_client_socket_fuzzer") {
     "//base",
     "//net",
   ]
-  dict = "data/http/http.dict"
+  dict = "//testing/libfuzzer/fuzzers/dicts/generated/net_http_proxy_client_socket_fuzzer.dict"
 }
 
 fuzzer_test("net_quic_crypto_framer_parse_message_fuzzer") {
@@ -2084,5 +2085,6 @@ fuzzer_test("net_url_request_fuzzer") {
     "//base",
     "//net",
   ]
-  dict = "data/http/http.dict"
+  dict =
+      "//testing/libfuzzer/fuzzers/dicts/generated/net_url_request_fuzzer.dict"
 }