Track QuicChromiumClientSession in net/ MemoryDumpProvider

net/quic/chromium/quic_stream_factory.cc

Index: net/quic/chromium/quic_stream_factory.cc
diff --git a/net/quic/chromium/quic_stream_factory.cc b/net/quic/chromium/quic_stream_factory.cc
index bee0b0ef2f7976f5bc3893aeadf3f1a700bd4da5..f8837e19ed0c42d5277e80efd52a76e254a85176 100644
--- a/net/quic/chromium/quic_stream_factory.cc
+++ b/net/quic/chromium/quic_stream_factory.cc
@@ -19,6 +19,9 @@
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "base/threading/thread_task_runner_handle.h"
+#include "base/trace_event/memory_allocator_dump.h"
+#include "base/trace_event/memory_usage_estimator.h"
+#include "base/trace_event/process_memory_dump.h"
 #include "base/trace_event/trace_event.h"
 #include "base/values.h"
 #include "crypto/openssl_util.h"
@@ -897,6 +900,24 @@ void QuicStreamFactory::set_quic_server_info_factory(
   quic_server_info_factory_.reset(quic_server_info_factory);
 }
 
+void QuicStreamFactory::DumpMemoryStats(
+    base::trace_event::ProcessMemoryDump* pmd,
+    const std::string& parent_absolute_name) const {
+  if (all_sessions_.empty())
+    return;
+  base::trace_event::MemoryAllocatorDump* factory_dump =
+      pmd->CreateAllocatorDump(parent_absolute_name + "/quic_stream_factory");
+  size_t memory_estimate =
+      base::trace_event::EstimateMemoryUsage(all_sessions_);
+  factory_dump->AddScalar(base::trace_event::MemoryAllocatorDump::kNameSize,
+                          base::trace_event::MemoryAllocatorDump::kUnitsBytes,
+                          memory_estimate);
+  factory_dump->AddScalar(
+      base::trace_event::MemoryAllocatorDump::kNameObjectCount,
+      base::trace_event::MemoryAllocatorDump::kUnitsObjects,
+      all_sessions_.size());
+}
+
 bool QuicStreamFactory::CanUseExistingSession(const QuicServerId& server_id,
                                               const HostPortPair& destination) {
   // TODO(zhongyi): delete active_sessions_.empty() checks once the
@@ -1047,6 +1068,11 @@ bool QuicStreamFactory::QuicSessionKey::operator==(
          server_id_ == other.server_id_;
 }
 
+size_t QuicStreamFactory::QuicSessionKey::EstimateMemoryUsage() const {
+  // Return 0 because QuicSessionKey is very small.
+  return 0;
+}
+
 void QuicStreamFactory::CreateAuxilaryJob(const QuicSessionKey& key,
                                           int cert_verify_flags,
                                           const NetLogWithSource& net_log) {