Fix HttpStreamParser fuzzer (again)

net/http/http_stream_parser_fuzzer.cc

Index: net/http/http_stream_parser_fuzzer.cc
diff --git a/net/http/http_stream_parser_fuzzer.cc b/net/http/http_stream_parser_fuzzer.cc
index 52343ac30b93dbec73f69e161c50f9cd68266a53..c58fa9f8554b815afce7466f0c1832efbd745a02 100644
--- a/net/http/http_stream_parser_fuzzer.cc
+++ b/net/http/http_stream_parser_fuzzer.cc
@@ -65,7 +65,10 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   result = parser.ReadResponseHeaders(callback.callback());
   result = callback.GetResult(result);
 
-  while (result > 0) {
+  if (result < 0)
+    return 0;
+
+  while (true) {
     scoped_refptr<net::IOBufferWithSize> io_buffer(
         new net::IOBufferWithSize(64));
     result = parser.ReadResponseBody(io_buffer.get(), io_buffer->size(),
@@ -74,8 +77,8 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
     // Releasing the pointer to IOBuffer immediately is more likely to lead to a
     // use-after-free.
     io_buffer = nullptr;
-
-    result = callback.GetResult(result);
+    if (callback.GetResult(result) <= 0)
+      break;
   }
 
   return 0;