Add hpack_fuzz_wrapper to chromium_builder_asan (re-apply).

net/spdy/fuzzing/hpack_fuzz_wrapper.cc

Index: net/spdy/fuzzing/hpack_fuzz_wrapper.cc
diff --git a/net/spdy/fuzzing/hpack_fuzz_wrapper.cc b/net/spdy/fuzzing/hpack_fuzz_wrapper.cc
index 63aa114bab1b762dbe3737c8fb1f93c51c02dc4e..35480822cc5f4f391734a2e2e9d6560273ce5d67 100644
--- a/net/spdy/fuzzing/hpack_fuzz_wrapper.cc
+++ b/net/spdy/fuzzing/hpack_fuzz_wrapper.cc
@@ -35,7 +35,8 @@ 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));
 
   HpackFuzzUtil::FuzzerContext context;
   HpackFuzzUtil::InitializeFuzzerContext(&context);