Add hpack_fuzz_wrapper to chromium_builder_asan (re-apply).

net/spdy/fuzzing/hpack_fuzz_mutator.cc

Index: net/spdy/fuzzing/hpack_fuzz_mutator.cc
diff --git a/net/spdy/fuzzing/hpack_fuzz_mutator.cc b/net/spdy/fuzzing/hpack_fuzz_mutator.cc
index c6d4e92a1385e2a92089aa5b92cb1d8b5d725087..f0a4c7a58ebac1e52ebf78f215ec67f9aec1d47f 100644
--- a/net/spdy/fuzzing/hpack_fuzz_mutator.cc
+++ b/net/spdy/fuzzing/hpack_fuzz_mutator.cc
@@ -50,10 +50,11 @@ int main(int argc, char** argv) {
 
   DVLOG(1) << "Reading input from " << file_to_parse;
   HpackFuzzUtil::Input input;
-  CHECK(base::ReadFileToString(base::FilePath(file_to_parse), &input.input));
+  CHECK(base::ReadFileToString(base::FilePath::FromUTF8Unsafe(file_to_parse),
+                               &input.input));
 
   DVLOG(1) << "Writing output to " << file_to_write;
-  base::File file_out(base::FilePath(file_to_write),
+  base::File file_out(base::FilePath::FromUTF8Unsafe(file_to_write),
                       base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE);
   CHECK(file_out.IsValid()) << file_out.error_details();