use std::unordered_map and std::unordered_set in QUIC code instead of

net/quic/quic_session.h

Index: net/quic/quic_session.h
diff --git a/net/quic/quic_session.h b/net/quic/quic_session.h
index 0201d4396cd6cdc767ab8b4a5ef50ae2b41122d3..007d4357bee371becf934d480fa991763ca30f66 100644
--- a/net/quic/quic_session.h
+++ b/net/quic/quic_session.h
@@ -11,6 +11,8 @@
 
 #include <map>
 #include <string>
+#include <unordered_map>
+#include <unordered_set>
 #include <vector>
 
 #include "base/compiler_specific.h"
@@ -225,7 +227,7 @@ class NET_EXPORT_PRIVATE QuicSession : public QuicConnectionVisitorInterface {
   bool ShouldYield(QuicStreamId stream_id);
 
  protected:
-  typedef base::hash_map<QuicStreamId, ReliableQuicStream*> StreamMap;
+  typedef std::unordered_map<QuicStreamId, ReliableQuicStream*> StreamMap;
 
   // Creates a new stream, owned by the caller, to handle a peer-initiated
   // stream.  Returns nullptr and does error handling if the stream can not be
@@ -373,12 +375,12 @@ class NET_EXPORT_PRIVATE QuicSession : public QuicConnectionVisitorInterface {
 
   // Set of stream ids that are less than the largest stream id that has been
   // received, but are nonetheless available to be created.
-  base::hash_set<QuicStreamId> available_streams_;
+  std::unordered_set<QuicStreamId> available_streams_;
 
   // Set of stream ids that are "draining" -- a FIN has been sent and received,
   // but the stream object still exists because not all the received data has
   // been consumed.
-  base::hash_set<QuicStreamId> draining_streams_;
+  std::unordered_set<QuicStreamId> draining_streams_;
 
   // A list of streams which need to write more data.
   QuicWriteBlockedList write_blocked_streams_;