Port QuicServer to Chrome network stack

net/quic/quic_in_memory_cache.h

Index: net/quic/quic_in_memory_cache.h
diff --git a/net/quic/quic_in_memory_cache.h b/net/quic/quic_in_memory_cache.h
index 752620abf2df401e32a954711f407cc5d0d9f30a..5f4f6e973b574c3a369bf94cf545a5f34c405d71 100644
--- a/net/quic/quic_in_memory_cache.h
+++ b/net/quic/quic_in_memory_cache.h
@@ -8,6 +8,7 @@
 #include <string>
 
 #include "base/containers/hash_tables.h"
+#include "base/file_util.h"
 #include "base/memory/singleton.h"
 #include "base/strings/string_piece.h"
 #include "net/base/net_export.h"
@@ -19,6 +20,8 @@ template <typename T> struct DefaultSingletonTraits;
 
 namespace net {
 
+extern base::FilePath g_quic_in_memory_cache_dir;
+
 namespace test {
 class QuicInMemoryCachePeer;
 }  // namespace