Do not roll back to SSL 3.0 for Google properties.

net/http/transport_security_state.cc

Index: net/http/transport_security_state.cc
diff --git a/net/http/transport_security_state.cc b/net/http/transport_security_state.cc
index 3fb95dde9a30666d7ca20abd212c06be775ed026..1df2f86669991ecbc0dd8bb46af20761cb7103b0 100644
--- a/net/http/transport_security_state.cc
+++ b/net/http/transport_security_state.cc
@@ -545,6 +545,7 @@ struct HSTSPreload {
   bool https_required;
   PublicKeyPins pins;
   SecondLevelDomainName second_level_domain_name;
+  SSL_CONNECTION_VERSION ssl_version_min;
 };
 
 static bool HasPreload(const struct HSTSPreload* entries, size_t num_entries,
@@ -558,6 +559,7 @@ static bool HasPreload(const struct HSTSPreload* entries, size_t num_entries,
         *ret = false;
       } else {
         out->include_subdomains = entries[j].include_subdomains;
+        out->ssl_version_min = entries[j].ssl_version_min;
         *ret = true;
         if (!entries[j].https_required)
           out->upgrade_mode = TransportSecurityState::DomainState::MODE_DEFAULT;
@@ -789,7 +791,8 @@ void TransportSecurityState::AddOrUpdateForcedHosts(
 TransportSecurityState::DomainState::DomainState()
     : upgrade_mode(MODE_FORCE_HTTPS),
       created(base::Time::Now()),
-      include_subdomains(false) {
+      include_subdomains(false),
+      ssl_version_min(SSL_CONNECTION_VERSION_SSL3) {
 }
 
 TransportSecurityState::DomainState::~DomainState() {