Add HTTP/2 error code from latest draft.

net/spdy/spdy_session.cc

Index: net/spdy/spdy_session.cc
diff --git a/net/spdy/spdy_session.cc b/net/spdy/spdy_session.cc
index 5430e27ff47869d8190c080c3b19f2aeaa07d1c5..c324a09348d0ca828d590f6713b10555994bc79c 100644
--- a/net/spdy/spdy_session.cc
+++ b/net/spdy/spdy_session.cc
@@ -398,6 +398,10 @@ SpdyProtocolErrorDetails MapRstStreamStatusToProtocolError(
       return STATUS_CODE_CONNECT_ERROR;
     case RST_STREAM_ENHANCE_YOUR_CALM:
       return STATUS_CODE_ENHANCE_YOUR_CALM;
+    case RST_STREAM_INADEQUATE_SECURITY:
+      return STATUS_CODE_INADEQUATE_SECURITY;
+    case RST_STREAM_HTTP_1_1_REQUIRED:
+      return STATUS_CODE_HTTP_1_1_REQUIRED;
     default:
       NOTREACHED();
       return static_cast<SpdyProtocolErrorDetails>(-1);