Simplify QUIC's encryption path now that FEC is gone. Protected by FLAG_quic_inplace_encryption.

net/quic/quic_framer.h

Index: net/quic/quic_framer.h
diff --git a/net/quic/quic_framer.h b/net/quic/quic_framer.h
index 5a96fb184c1b8dfacb6fc8581530d14f520e5272..a0a0db1afeb0a0d2880c2deb14ea89793b3118b0 100644
--- a/net/quic/quic_framer.h
+++ b/net/quic/quic_framer.h
@@ -307,6 +307,17 @@ class NET_EXPORT_PRIVATE QuicFramer {
   // takes ownership of |encrypter|.
   void SetEncrypter(EncryptionLevel level, QuicEncrypter* encrypter);
 
+  // Encrypts a payload in |buffer|.  |ad_len| is the length of the associated
+  // data. |total_len| is the length of the associated data plus plaintext.
+  // |buffer_len| is the full length of the allocated buffer.
+  size_t EncryptInPlace(EncryptionLevel level,
+                        QuicPathId path_id,
+                        QuicPacketNumber packet_number,
+                        size_t ad_len,
+                        size_t total_len,
+                        size_t buffer_len,
+                        char* buffer);
+
   // Returns the length of the data encrypted into |buffer| if |buffer_len| is
   // long enough, and otherwise 0.
   size_t EncryptPayload(EncryptionLevel level,