Log states of JobController in Net MemoryDumpProvider

net/http/http_stream_factory_impl.cc

Index: net/http/http_stream_factory_impl.cc
diff --git a/net/http/http_stream_factory_impl.cc b/net/http/http_stream_factory_impl.cc
index 577a990853ae6ac0e4d83987152c46b7873ee019..0c525e14d819794f6b15414039fd3e3962b64f01 100644
--- a/net/http/http_stream_factory_impl.cc
+++ b/net/http/http_stream_factory_impl.cc
@@ -11,6 +11,10 @@
 #include "base/metrics/histogram_macros.h"
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
+#include "base/strings/stringprintf.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 "net/http/http_network_session.h"
 #include "net/http/http_server_properties.h"
 #include "net/http/http_stream_factory_impl_job.h"
@@ -302,4 +306,50 @@ bool HttpStreamFactoryImpl::ProxyServerSupportsPriorities(
       scheme_host_port);
 }
 
+void HttpStreamFactoryImpl::DumpMemoryStats(
+    base::trace_event::ProcessMemoryDump* pmd,
+    const std::string& parent_absolute_name) const {
+  if (job_controller_set_.empty())
+    return;
+  std::string name =
+      base::StringPrintf("%s/stream_factory", parent_absolute_name.c_str());
+  base::trace_event::MemoryAllocatorDump* factory_dump =
+      pmd->CreateAllocatorDump(name);
+  size_t alt_job_count = 0;
+  size_t main_job_count = 0;
+  size_t preconnect_controller_count = 0;
+  for (const auto& it : job_controller_set_) {
+    // For a preconnect controller, it should have exactly the main job.
+    if (it->is_preconnect()) {
+      preconnect_controller_count++;
+      continue;
+    }
+    // For non-preconnects.
+    if (it->HasPendingAltJob())
+      alt_job_count++;
+    if (it->HasPendingMainJob())
+      main_job_count++;
+  }
+  factory_dump->AddScalar(
+      base::trace_event::MemoryAllocatorDump::kNameSize,
+      base::trace_event::MemoryAllocatorDump::kUnitsBytes,
+      base::trace_event::EstimateMemoryUsage(job_controller_set_));
+  factory_dump->AddScalar(
+      base::trace_event::MemoryAllocatorDump::kNameObjectCount,
+      base::trace_event::MemoryAllocatorDump::kUnitsObjects,
+      job_controller_set_.size());
+  // The number of non-preconnect controllers with a pending alt job.
+  factory_dump->AddScalar("alt_job_count",
+                          base::trace_event::MemoryAllocatorDump::kUnitsObjects,
+                          alt_job_count);
+  // The number of non-preconnect controllers with a pending main job.
+  factory_dump->AddScalar("main_job_count",
+                          base::trace_event::MemoryAllocatorDump::kUnitsObjects,
+                          main_job_count);
+  // The number of preconnect controllers.
+  factory_dump->AddScalar("preconnect_count",
+                          base::trace_event::MemoryAllocatorDump::kUnitsObjects,
+                          preconnect_controller_count);
+}
+
 }  // namespace net