Revert 129277 - Revert 127893 - Attempting to re-land the feature.

net/spdy/spdy_session.h

 // Copyright (c) 2012 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_SPDY_SPDY_SESSION_H_
 #define NET_SPDY_SPDY_SESSION_H_
 #pragma once
 
 #include <algorithm>
 #include <list>
@@ skipping 32 matching lines @@
 // somewhat arbitrary, but is reasonably small and ensures that we elicit
 // ACKs quickly from TCP (because TCP tries to only ACK every other packet).
 const int kMss = 1430;
 const int kMaxSpdyFrameChunkSize = (2 * kMss) - SpdyFrame::kHeaderSize;
 
 class BoundNetLog;
 class SpdyStream;
 class SSLInfo;
 
 class NET_EXPORT SpdySession : public base::RefCounted<SpdySession>,
-                               public BufferedSpdyFramerVisitorInterface {
+                               public BufferedSpdyFramerVisitorInterface,
+                               public LayeredPool {
  public:
   // Create a new SpdySession.
   // |host_port_proxy_pair| is the host/port that this session connects to, and
   // the proxy configuration settings that it's using.
   // |spdy_session_pool| is the SpdySessionPool that owns us.  Its lifetime must
   // strictly be greater than |this|.
   // |session| is the HttpNetworkSession.  |net_log| is the NetLog that we log
   // network events to.
   SpdySession(const HostPortProxyPair& host_port_proxy_pair,
               SpdySessionPool* spdy_session_pool,
@@ skipping 197 matching lines @@
   // Adds |alias| to set of aliases associated with this session.
   void AddPooledAlias(const HostPortProxyPair& alias);
 
   // Returns the set of aliases associated with this session.
   const std::set<HostPortProxyPair>& pooled_aliases() const {
     return pooled_aliases_;
   }
 
   int GetProtocolVersion() const;
 
+  // LayeredPool implementation.
+  virtual bool CloseOneIdleConnection() OVERRIDE;
+
  private:
   friend class base::RefCounted<SpdySession>;
 
   // Allow tests to access our innards for testing purposes.
   FRIEND_TEST_ALL_PREFIXES(SpdySessionSpdy2Test, Ping);
   FRIEND_TEST_ALL_PREFIXES(SpdySessionSpdy2Test, FailedPing);
   FRIEND_TEST_ALL_PREFIXES(SpdySessionSpdy2Test, GetActivePushStream);
+  FRIEND_TEST_ALL_PREFIXES(SpdySessionSpdy2Test, CloseOneIdleConnection);
   FRIEND_TEST_ALL_PREFIXES(SpdySessionSpdy3Test, Ping);
   FRIEND_TEST_ALL_PREFIXES(SpdySessionSpdy3Test, FailedPing);
   FRIEND_TEST_ALL_PREFIXES(SpdySessionSpdy3Test, GetActivePushStream);
+  FRIEND_TEST_ALL_PREFIXES(SpdySessionSpdy3Test, CloseOneIdleConnection);
 
   struct PendingCreateStream {
     PendingCreateStream(const GURL& url, RequestPriority priority,
                         scoped_refptr<SpdyStream>* spdy_stream,
                         const BoundNetLog& stream_net_log,
                         const CompletionCallback& callback)
         : url(&url),
           priority(priority),
           spdy_stream(spdy_stream),
           stream_net_log(&stream_net_log),
@@ skipping 397 matching lines @@
 
   const int status_;
   const std::string description_;
 
   DISALLOW_COPY_AND_ASSIGN(NetLogSpdySessionCloseParameter);
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_SPDY_SESSION_H_