Instrument SpdySessionPool using MemoryDumpProvider

net/spdy/spdy_session_pool.h

Index: net/spdy/spdy_session_pool.h
diff --git a/net/spdy/spdy_session_pool.h b/net/spdy/spdy_session_pool.h
index 90e1b252b37e9af460955a11c2fa5cd5b7799555..744f2c0eb5542bf3368541c5181b077be37631f6 100644
--- a/net/spdy/spdy_session_pool.h
+++ b/net/spdy/spdy_session_pool.h
@@ -26,6 +26,12 @@
 #include "net/spdy/spdy_session_key.h"
 #include "net/ssl/ssl_config_service.h"
 
+namespace base {
+namespace trace_event {
+class ProcessMemoryDump;
+}
+}
+
 namespace net {
 
 class ClientSocketHandle;
@@ -143,6 +149,9 @@ class NET_EXPORT SpdySessionPool
   // is changed.
   void OnCertDBChanged(const X509Certificate* cert) override;
 
+  void DumpMemoryStats(base::trace_event::ProcessMemoryDump* pmd,
+                       const std::string& parent_dump_absolute_name) const;
+
  private:
   friend class SpdySessionPoolPeer;  // For testing.