Fix and refactor HttpServerPropertiesImpl's alternative services brokenness expiration behavior

net/BUILD.gn

Index: net/BUILD.gn
diff --git a/net/BUILD.gn b/net/BUILD.gn
index 6b6dbf8297db54f0a4a407a0e15078921cfc818e..ac40a7ae86389f5aabc68f9e26dcc4d05433cab0 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -793,6 +793,8 @@ component("net") {
       "http/bidirectional_stream_impl.h",
       "http/bidirectional_stream_request_info.cc",
       "http/bidirectional_stream_request_info.h",
+      "http/broken_alternative_services.cc",
+      "http/broken_alternative_services.h",
       "http/des.cc",
       "http/des.h",
       "http/failing_http_transaction_factory.cc",
@@ -4436,6 +4438,7 @@ test("net_unittests") {
     "ftp/ftp_network_transaction_unittest.cc",
     "ftp/ftp_util_unittest.cc",
     "http/bidirectional_stream_unittest.cc",
+    "http/broken_alternative_services_unittest.cc",
     "http/des_unittest.cc",
     "http/http_auth_cache_unittest.cc",
     "http/http_auth_challenge_tokenizer_unittest.cc",