Do not roll back to SSL 3.0 for Google properties.

net/ssl/ssl_config_service.cc

Index: net/ssl/ssl_config_service.cc
diff --git a/net/ssl/ssl_config_service.cc b/net/ssl/ssl_config_service.cc
index f46dd7b7dc72450d91be28d10b4a9c3135837fac..7f106ca4ec5a68c2cea99860ba0c76f85cdf8bb3 100644
--- a/net/ssl/ssl_config_service.cc
+++ b/net/ssl/ssl_config_service.cc
@@ -40,6 +40,7 @@ SSLConfig::SSLConfig()
       cached_info_enabled(false),
       channel_id_enabled(true),
       false_start_enabled(true),
+      ssl_version_min_preloaded_disabled(false),
       send_client_cert(false),
       verify_ev_cert(false),
       version_fallback(false),
@@ -69,6 +70,38 @@ bool SSLConfig::IsAllowedBadCert(const base::StringPiece& der_cert,
   return false;
 }
 
+// static
+std::string SSLConfig::SSLProtocolVersionToString(uint16 version) {
+  switch (version) {
+    case net::SSL_PROTOCOL_VERSION_SSL3:
+      return "ssl3";
+    case net::SSL_PROTOCOL_VERSION_TLS1:
+      return "tls1";
+    case net::SSL_PROTOCOL_VERSION_TLS1_1:
+      return "tls1.1";
+    case net::SSL_PROTOCOL_VERSION_TLS1_2:
+      return "tls1.2";
+    default:
+      NOTREACHED();
+      return std::string();
+  }
+}
+
+// static
+uint16 SSLConfig::SSLProtocolVersionFromString(const std::string& version_str) {
+  uint16 version = 0;  // Invalid.
+  if (version_str == "ssl3") {
+    version = net::SSL_PROTOCOL_VERSION_SSL3;
+  } else if (version_str == "tls1") {
+    version = net::SSL_PROTOCOL_VERSION_TLS1;
+  } else if (version_str == "tls1.1") {
+    version = net::SSL_PROTOCOL_VERSION_TLS1_1;
+  } else if (version_str == "tls1.2") {
+    version = net::SSL_PROTOCOL_VERSION_TLS1_2;
+  }
+  return version;
+}
+
 SSLConfigService::SSLConfigService()
     : observer_list_(ObserverList<Observer>::NOTIFY_EXISTING_ONLY) {
 }
@@ -154,8 +187,10 @@ void SSLConfigService::ProcessConfigUpdate(const SSLConfig& orig_config,
       (orig_config.version_min != new_config.version_min) ||
       (orig_config.version_max != new_config.version_max) ||
       (orig_config.disabled_cipher_suites !=
-       new_config.disabled_cipher_suites) ||
+          new_config.disabled_cipher_suites) ||
       (orig_config.channel_id_enabled != new_config.channel_id_enabled) ||
+      (orig_config.ssl_version_min_preloaded_disabled !=
+          new_config.ssl_version_min_preloaded_disabled) ||
       (orig_config.false_start_enabled != new_config.false_start_enabled);
 
   if (config_changed)