Pass QuicInMemoryCache directly instead of using a singleton.

net/tools/quic/test_tools/quic_in_memory_cache_peer.h

Index: net/tools/quic/test_tools/quic_in_memory_cache_peer.h
diff --git a/net/tools/quic/test_tools/quic_in_memory_cache_peer.h b/net/tools/quic/test_tools/quic_in_memory_cache_peer.h
deleted file mode 100644
index 55d28d3f0e21e67849f02dfd346fc1e1eb5b1bd3..0000000000000000000000000000000000000000
--- a/net/tools/quic/test_tools/quic_in_memory_cache_peer.h
+++ /dev/null
@@ -1,26 +0,0 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#ifndef NET_TOOLS_QUIC_TEST_TOOLS_QUIC_IN_MEMORY_CACHE_PEER_H_
-#define NET_TOOLS_QUIC_TEST_TOOLS_QUIC_IN_MEMORY_CACHE_PEER_H_
-
-#include "base/macros.h"
-#include "net/tools/quic/quic_in_memory_cache.h"
-
-namespace net {
-namespace test {
-
-class QuicInMemoryCachePeer {
- public:
-  // Resets the singleton QuicInMemoryCache to a fresh state.
-  static void ResetForTests();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(QuicInMemoryCachePeer);
-};
-
-}  // namespace test
-}  // namespace net
-
-#endif  // NET_TOOLS_QUIC_TEST_TOOLS_QUIC_IN_MEMORY_CACHE_PEER_H_