Instrument SpdySessionPool using MemoryDumpProvider

net/spdy/spdy_session.cc

Index: net/spdy/spdy_session.cc
diff --git a/net/spdy/spdy_session.cc b/net/spdy/spdy_session.cc
index bbb754137c942d5792f363368fd06236dca8f6c2..73d23c6b4f13101a599b2163822c5ab4215926dc 100644
--- a/net/spdy/spdy_session.cc
+++ b/net/spdy/spdy_session.cc
@@ -24,6 +24,8 @@
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "base/time/time.h"
+#include "base/trace_event/memory_allocator_dump.h"
+#include "base/trace_event/process_memory_dump.h"
 #include "base/trace_event/trace_event.h"
 #include "base/values.h"
 #include "crypto/ec_private_key.h"
@@ -970,6 +972,17 @@ bool SpdySession::CloseOneIdleConnection() {
   return false;
 }
 
+void SpdySession::DumpMemoryStats(
+    base::trace_event::ProcessMemoryDump* pmd,
+    const std::string& parent_absolute_name) const {
+  std::string name =
+      base::StringPrintf("%s/session_%p", parent_absolute_name.c_str(), this);
+  base::trace_event::MemoryAllocatorDump* session_dump =
+      pmd->CreateAllocatorDump(name);
+  session_dump->AddString("active", "", is_active() ? "1" : "0");
+  connection_->DumpMemoryStats(pmd, name);
+}
+
 void SpdySession::EnqueueStreamWrite(
     const base::WeakPtr<SpdyStream>& stream,
     SpdyFrameType frame_type,