Remove unused BidirectionalStream::SendData() method and implementations.

net/spdy/chromium/bidirectional_stream_spdy_impl_unittest.cc

Index: net/spdy/chromium/bidirectional_stream_spdy_impl_unittest.cc
diff --git a/net/spdy/chromium/bidirectional_stream_spdy_impl_unittest.cc b/net/spdy/chromium/bidirectional_stream_spdy_impl_unittest.cc
index 3b81307cddbe9e2026b248e940e4755d627ddc7a..e291424b243541413a3e0af541cd97c66c1e72fe 100644
--- a/net/spdy/chromium/bidirectional_stream_spdy_impl_unittest.cc
+++ b/net/spdy/chromium/bidirectional_stream_spdy_impl_unittest.cc
@@ -139,9 +139,7 @@ class TestDelegateBase : public BidirectionalStreamImpl::Delegate {
   }
 
   void SendData(IOBuffer* data, int length, bool end_of_stream) {
-    not_expect_callback_ = true;
-    stream_->SendData(data, length, end_of_stream);
-    not_expect_callback_ = false;
+    SendvData({data}, {length}, end_of_stream);
   }
 
   void SendvData(const std::vector<scoped_refptr<IOBuffer>>& data,