relnote: refactoring spdy/quic utils, adding SpdyHeadersToBalsaHeaders

Adding SpdyHeadersToRequestHeaders using a shared
SpdyHeadersToRequestHeaders which includes a bunch of DCHECKs which I
spent time debugging the nonexistance of.

Also clearing keep-alive when we serialize HTTP->SPDY as it's illegal.

Ported this change to chromium by implementing
SpdyHeadersToRequestHeaders.

Merge internal change: 96206736

[email protected]

Review URL: https://codereview.chromium.org/1250323004

Cr-Commit-Position: refs/heads/master@{#340300}
diff --git a/net/net.gypi b/net/net.gypi
index 9d18641..85301b8 100644
--- a/net/net.gypi
+++ b/net/net.gypi
@@ -1818,6 +1818,7 @@
       'tools/quic/quic_spdy_client_stream_test.cc',
       'tools/quic/quic_spdy_server_stream_test.cc',
       'tools/quic/quic_time_wait_list_manager_test.cc',
+      'tools/quic/spdy_balsa_utils_test.cc',
       'tools/quic/test_tools/http_message.cc',
       'tools/quic/test_tools/http_message.h',
       'tools/quic/test_tools/limited_mtu_test_writer.cc',