Fix various TaskManager bugs and add new enhancements

chrome/browser/task_management/sampling/task_manager_impl.cc

Index: chrome/browser/task_management/sampling/task_manager_impl.cc
diff --git a/chrome/browser/task_management/sampling/task_manager_impl.cc b/chrome/browser/task_management/sampling/task_manager_impl.cc
index 97793437bf41e628dbb549152e5c42cc8558abcb..cb150dccf9dd21e9f6d090f0f3986abbd32667e6 100644
--- a/chrome/browser/task_management/sampling/task_manager_impl.cc
+++ b/chrome/browser/task_management/sampling/task_manager_impl.cc
@@ -92,7 +92,7 @@ int TaskManagerImpl::GetNaClDebugStubPort(TaskId task_id) const {
 #if !defined(DISABLE_NACL)
   return GetTaskGroupByTaskId(task_id)->nacl_debug_stub_port();
 #else
-  return -1;
+  return -2;
 #endif  // !defined(DISABLE_NACL)
 }
 
@@ -151,6 +151,10 @@ int64 TaskManagerImpl::GetNetworkUsage(TaskId task_id) const {
   return GetTaskByTaskId(task_id)->network_usage();
 }
 
+int64 TaskManagerImpl::GetProcessTotalNetworkUsage(TaskId task_id) const {
+  return GetTaskGroupByTaskId(task_id)->per_process_network_usage();
+}
+
 int64 TaskManagerImpl::GetSqliteMemoryUsed(TaskId task_id) const {
   return GetTaskByTaskId(task_id)->GetSqliteMemoryUsed();
 }