[OBSOLETE][memory-infra] Whitelist net dump providers in field trials

net/http/http_network_session.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/http/http_network_session.h"
 
 #include <utility>
 
 #include "base/atomic_sequence_num.h"
 #include "base/compiler_specific.h"
@@ skipping 411 matching lines @@
   std::string name = base::StringPrintf("net/http_network_session_%p", this);
   base::trace_event::MemoryAllocatorDump* http_network_session_dump =
       pmd->GetAllocatorDump(name);
   if (http_network_session_dump == nullptr) {
     http_network_session_dump = pmd->CreateAllocatorDump(name);
     normal_socket_pool_manager_->DumpMemoryStats(
         pmd, http_network_session_dump->absolute_name());
     spdy_session_pool_.DumpMemoryStats(
         pmd, http_network_session_dump->absolute_name());
   }
+
   // Create an empty row under parent's dump so size can be attributed correctly
-  // if |this| is shared between URLRequestContexts.
-  base::trace_event::MemoryAllocatorDump* empty_row_dump =
-      pmd->CreateAllocatorDump(base::StringPrintf(
-          "%s/http_network_session", parent_absolute_name.c_str()));
-  pmd->AddOwnershipEdge(empty_row_dump->guid(),
-                        http_network_session_dump->guid());
+  // if |this| is shared between URLRequestContexts. It is not required if
+  // parent details are not reported.
+  if (!parent_absolute_name.empty()) {
+    base::trace_event::MemoryAllocatorDump* empty_row_dump =
+        pmd->CreateAllocatorDump(base::StringPrintf(
+            "%s/http_network_session", parent_absolute_name.c_str()));
+    pmd->AddOwnershipEdge(empty_row_dump->guid(),
+                          http_network_session_dump->guid());
+  }
 }
 
 bool HttpNetworkSession::IsQuicEnabled() const {
   return params_.enable_quic;
 }
 
 void HttpNetworkSession::DisableQuic() {
   params_.enable_quic = false;
 }
 
@@ skipping 35 matching lines @@
       break;
     case base::MemoryState::SUSPENDED:
     // Note: Not supported at present. Fall through.
     case base::MemoryState::UNKNOWN:
       NOTREACHED();
       break;
   }
 }
 
 }  // namespace net