Added a net::BidirectionalStream to expose a bidirectional streaming interface

net/net.gyp

Index: net/net.gyp
diff --git a/net/net.gyp b/net/net.gyp
index 6579e15864847470e238ad992689abf741a0b6fb..55ba46a98886d603ccae2074fd961fcb6c4ef7ad 100644
--- a/net/net.gyp
+++ b/net/net.gyp
@@ -283,6 +283,12 @@
             ],
           },
         ],
+        [ 'enable_bidirectional_stream!=1', {
+            'sources!': [
+              'http/bidirectional_stream_unittest.cc',
+            ],
+          },
+        ],
         [ 'enable_built_in_dns!=1', {
             'sources!': [
               'dns/address_sorter_posix_unittest.cc',