Close idle connections / SPDY sessions when needed.

net/spdy/spdy_session.h

Index: net/spdy/spdy_session.h
diff --git a/net/spdy/spdy_session.h b/net/spdy/spdy_session.h
index e1bdd694c93ce8a163f429376e6bcb5cb5cde45f..876b790e6c9c97f126f0bf2d6db18c41a6d2e285 100644
--- a/net/spdy/spdy_session.h
+++ b/net/spdy/spdy_session.h
@@ -14,6 +14,7 @@
 
 #include "base/gtest_prod_util.h"
 #include "base/memory/linked_ptr.h"
+#include "base/memory/weak_ptr.h"
 #include "base/memory/ref_counted.h"
 #include "base/task.h"
 #include "net/base/io_buffer.h"
@@ -45,7 +46,8 @@ class SpdyStream;
 class SSLInfo;
 
 class NET_EXPORT SpdySession : public base::RefCounted<SpdySession>,
-                               public spdy::SpdyFramerVisitorInterface {
+                               public spdy::SpdyFramerVisitorInterface,
+                               public LayeredPool {
  public:
   // Create a new SpdySession.
   // |host_port_proxy_pair| is the host/port that this session connects to, and
@@ -224,6 +226,9 @@ class NET_EXPORT SpdySession : public base::RefCounted<SpdySession>,
   int GetPeerAddress(AddressList* address) const;
   int GetLocalAddress(IPEndPoint* address) const;
 
+  // LayeredPool methods:
+  virtual bool CloseOneIdleConnection();
+
  private:
   friend class base::RefCounted<SpdySession>;
   // Allow tests to access our innards for testing purposes.