Instrument SSL sockets using MemoryDumpProvider

net/http/http_network_session.cc

Index: net/http/http_network_session.cc
diff --git a/net/http/http_network_session.cc b/net/http/http_network_session.cc
index f81f4882f6a54cf425ab6c96aba5ad21cae54c85..5d2a78681c4ed644a8b536be7f850a02ba7b0fef 100644
--- a/net/http/http_network_session.cc
+++ b/net/http/http_network_session.cc
@@ -15,6 +15,9 @@
 #include "base/profiler/scoped_tracker.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
+#include "base/strings/stringprintf.h"
+#include "base/trace_event/memory_allocator_dump.h"
+#include "base/trace_event/process_memory_dump.h"
 #include "base/values.h"
 #include "net/base/network_throttle_manager_impl.h"
 #include "net/http/http_auth_handler_factory.h"
@@ -377,6 +380,29 @@ void HttpNetworkSession::GetSSLConfig(const HttpRequestInfo& request,
   }
 }
 
+void HttpNetworkSession::DumpMemoryStats(
+    base::trace_event::ProcessMemoryDump* pmd,
+    const std::string& parent_absolute_name) const {
+  std::string name = base::StringPrintf("net/http_network_session_%p", this);
+  base::trace_event::MemoryAllocatorDump* http_network_session_dump =
+      pmd->GetAllocatorDump(name);
+  // If memory dump already exists, it means that this is not the first
+  // DumpMemoryStats() invocation on this object and it is reached by another
+  // "parent." If that's the case, add an ownership edge and return early.
+  // This is needed because URLRequestContexts can share an HttpNetworkSession.
+  if (http_network_session_dump != nullptr) {
+    pmd->AddOwnershipEdge(pmd->GetAllocatorDump(parent_absolute_name)->guid(),
+                          http_network_session_dump->guid());
+
+    return;
+  }
+  http_network_session_dump = pmd->CreateAllocatorDump(name);
+  normal_socket_pool_manager_->DumpMemoryStats(
+      pmd, http_network_session_dump->absolute_name());
+  pmd->AddOwnershipEdge(pmd->GetAllocatorDump(parent_absolute_name)->guid(),
+                        http_network_session_dump->guid());
+}
+
 ClientSocketPoolManager* HttpNetworkSession::GetSocketPoolManager(
     SocketPoolType pool_type) {
   switch (pool_type) {