Support Kerberos on Android

net/BUILD.gn

Index: net/BUILD.gn
diff --git a/net/BUILD.gn b/net/BUILD.gn
index 45931187b29ac8b8e0d448ffdfc712c77dd761ef..7a2b9721f33981ae0ae6c4881dcba1b113099c57 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -1215,6 +1215,7 @@ if (is_android) {
       "android/java/src/org/chromium/net/AndroidNetworkLibrary.java",
       "android/java/src/org/chromium/net/AndroidPrivateKey.java",
       "android/java/src/org/chromium/net/GURLUtils.java",
+      "android/java/src/org/chromium/net/HttpNegotiateAuthenticator.java",
       "android/java/src/org/chromium/net/NetworkChangeNotifier.java",
       "android/java/src/org/chromium/net/ProxyChangeListener.java",
       "android/java/src/org/chromium/net/X509Util.java",
@@ -1224,6 +1225,7 @@ if (is_android) {
   generate_jni("net_test_jni_headers") {
     sources = [
       "android/javatests/src/org/chromium/net/AndroidKeyStoreTestUtil.java",
+      "test/android/javatests/src/org/chromium/net/test/DummySpnegoAuthenticator.java",
     ]
     jni_package = "net"
   }
@@ -1407,14 +1409,20 @@ if (!is_android && !is_mac) {
 
     if (use_kerberos) {
       defines += [ "USE_KERBEROS" ]
-    } else {
+    }
+
+    # These are excluded on Android, because the actual Kerberos support, which
+    # these test, is in a separate app on Android.
+    if (!use_kerberos || is_android) {
       sources -= [
         "http/http_auth_gssapi_posix_unittest.cc",
-        "http/http_auth_handler_negotiate_unittest.cc",
         "http/mock_gssapi_library_posix.cc",
         "http/mock_gssapi_library_posix.h",
       ]
     }
+    if (!use_kerberos) {
+      sources -= [ "http/http_auth_handler_negotiate_unittest.cc" ]
+    }
 
     if (use_openssl || (!is_desktop_linux && !is_chromeos && !is_ios)) {
       # Only include this test when on Posix and using NSS for