Change QuicFramer so it accepts a QuicDataWriter rather than allocating

net/quic/crypto/crypto_framer.cc

Index: net/quic/crypto/crypto_framer.cc
diff --git a/net/quic/crypto/crypto_framer.cc b/net/quic/crypto/crypto_framer.cc
index 79e17edbf1b79beffe1d6382d81f135f28c89461..196883765a412ed68511490cb00c362f5183531c 100644
--- a/net/quic/crypto/crypto_framer.cc
+++ b/net/quic/crypto/crypto_framer.cc
@@ -106,8 +106,8 @@ QuicData* CryptoFramer::ConstructHandshakeMessage(
     return nullptr;
   }
 
-
-  QuicDataWriter writer(len);
+  scoped_ptr<char[]> buffer(new char[len]);
+  QuicDataWriter writer(len, buffer.get());
   if (!writer.WriteUInt32(message.tag())) {
     DCHECK(false) << "Failed to write message tag.";
     return nullptr;
@@ -181,7 +181,7 @@ QuicData* CryptoFramer::ConstructHandshakeMessage(
     }
   }
 
-  return new QuicData(writer.take(), len, true);
+  return new QuicData(buffer.release(), len, true);
 }
 
 void CryptoFramer::Clear() {