Remove support for the keygen tag

net/net.gypi

Index: net/net.gypi
diff --git a/net/net.gypi b/net/net.gypi
index c69b8b3574f57c130edc36b475ee0155d896f0c0..31d46a0cabb4c73c97b63fd83a67629c4c3489d5 100644
--- a/net/net.gypi
+++ b/net/net.gypi
@@ -46,9 +46,6 @@
       'base/network_interfaces.cc',
       'base/network_interfaces.h',
       'base/network_interfaces_posix.cc',
-      'base/openssl_private_key_store.h',
-      'base/openssl_private_key_store_android.cc',
-      'base/openssl_private_key_store_memory.cc',
       'base/parse_number.cc',
       'base/parse_number.h',
       'base/port_util.cc',
@@ -316,12 +313,6 @@
       'base/iovec.h',
       'base/ip_pattern.cc',
       'base/ip_pattern.h',
-      'base/keygen_handler.cc',
-      'base/keygen_handler.h',
-      'base/keygen_handler_mac.cc',
-      'base/keygen_handler_nss.cc',
-      'base/keygen_handler_openssl.cc',
-      'base/keygen_handler_win.cc',
       # TODO(tc): gnome-vfs? xdgmime? /etc/mime.types?
       'base/layered_network_delegate.cc',
       'base/layered_network_delegate.h',
@@ -1430,8 +1421,6 @@
       'ssl/test_ssl_private_key.h',
       'ssl/threaded_ssl_private_key.cc',
       'ssl/threaded_ssl_private_key.h',
-      'third_party/mozilla_security_manager/nsKeygenHandler.cpp',
-      'third_party/mozilla_security_manager/nsKeygenHandler.h',
       'third_party/mozilla_security_manager/nsNSSCertificateDB.cpp',
       'third_party/mozilla_security_manager/nsNSSCertificateDB.h',
       'third_party/mozilla_security_manager/nsPKCS12Blob.cpp',
@@ -1560,7 +1549,6 @@
       'base/ip_address_unittest.cc',
       'base/ip_endpoint_unittest.cc',
       'base/ip_pattern_unittest.cc',
-      'base/keygen_handler_unittest.cc',
       'base/layered_network_delegate_unittest.cc',
       'base/lookup_string_in_fixed_set_unittest.cc',
       'base/mime_sniffer_unittest.cc',