Persist broken and recently-broken alt-svcs to prefs in HttpServerPropertiesManager

net/http/http_server_properties.cc

Index: net/http/http_server_properties.cc
diff --git a/net/http/http_server_properties.cc b/net/http/http_server_properties.cc
index 15947b2a49e9dbb1bcbe1195953aa4d8587c37ea..fb19ffb873ea1cbbe768630a8e42456dacfe46aa 100644
--- a/net/http/http_server_properties.cc
+++ b/net/http/http_server_properties.cc
@@ -6,6 +6,7 @@
 
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
+#include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "net/socket/ssl_client_socket.h"
 #include "net/ssl/ssl_config.h"
@@ -102,6 +103,29 @@ std::string AlternativeService::ToString() const {
                             host.c_str(), port);
 }
 
+bool AlternativeService::FromString(const std::string& str,
+                                    AlternativeService* alternative_service) {
+  size_t space_pos = str.find(' ');
+  if (space_pos == std::string::npos)
+    return false;
+  size_t colon_pos = str.find(':');
+  if (colon_pos == std::string::npos)
+    return false;
+
+  alternative_service->protocol = NextProtoFromString(str.substr(0, space_pos));
+  alternative_service->host =
+      str.substr(space_pos + 1, colon_pos - space_pos - 1);
+
+  unsigned port_uint;
+  if (!base::StringToUint(str.substr(colon_pos + 1), &port_uint))
+    return false;
+  if (port_uint > std::numeric_limits<uint16_t>::max())
+    return false;
+  alternative_service->port = (uint16_t)port_uint;
+
+  return true;
+}
+
 std::string AlternativeServiceInfo::ToString() const {
   base::Time::Exploded exploded;
   expiration_.LocalExplode(&exploded);