Linux: control usage of Kerberos via use_kerberos gyp flag

net/http/http_auth_handler_factory.cc

Index: net/http/http_auth_handler_factory.cc
diff --git a/net/http/http_auth_handler_factory.cc b/net/http/http_auth_handler_factory.cc
index 88916f9d4858aca95c56c9a9e62f6e73ea1e032e..fcf2e452d2a252ac23c45655b4650d0f57dcbf3c 100644
--- a/net/http/http_auth_handler_factory.cc
+++ b/net/http/http_auth_handler_factory.cc
@@ -10,7 +10,9 @@
 #include "net/http/http_auth_filter.h"
 #include "net/http/http_auth_handler_basic.h"
 #include "net/http/http_auth_handler_digest.h"
+#if defined(USE_KERBEROS)
 #include "net/http/http_auth_handler_negotiate.h"
+#endif
 #include "net/http/http_auth_handler_ntlm.h"
 
 namespace net {
@@ -49,6 +51,7 @@ HttpAuthHandlerRegistryFactory* HttpAuthHandlerFactory::CreateDefault(
   registry_factory->RegisterSchemeFactory(
       "digest", new HttpAuthHandlerDigest::Factory());
 
+#if defined(USE_KERBEROS)
   HttpAuthHandlerNegotiate::Factory* negotiate_factory =
       new HttpAuthHandlerNegotiate::Factory();
 #if defined(OS_POSIX)
@@ -58,6 +61,7 @@ HttpAuthHandlerRegistryFactory* HttpAuthHandlerFactory::CreateDefault(
 #endif
   negotiate_factory->set_host_resolver(host_resolver);
   registry_factory->RegisterSchemeFactory("negotiate", negotiate_factory);
+#endif  // defined(USE_KERBEROS)
 
   HttpAuthHandlerNTLM::Factory* ntlm_factory =
       new HttpAuthHandlerNTLM::Factory();
@@ -144,6 +148,7 @@ HttpAuthHandlerRegistryFactory* HttpAuthHandlerRegistryFactory::Create(
 #endif
     registry_factory->RegisterSchemeFactory("ntlm", ntlm_factory);
   }
+#if defined(USE_KERBEROS)
   if (IsSupportedScheme(supported_schemes, "negotiate")) {
     HttpAuthHandlerNegotiate::Factory* negotiate_factory =
         new HttpAuthHandlerNegotiate::Factory();
@@ -160,6 +165,7 @@ HttpAuthHandlerRegistryFactory* HttpAuthHandlerRegistryFactory::Create(
     negotiate_factory->set_use_port(negotiate_enable_port);
     registry_factory->RegisterSchemeFactory("negotiate", negotiate_factory);
   }
+#endif  // defined(USE_KERBEROS)
 
   return registry_factory;
 }