plumb network upload into the task manager

chrome/browser/task_manager/sampling/task_group.h

Index: chrome/browser/task_manager/sampling/task_group.h
diff --git a/chrome/browser/task_manager/sampling/task_group.h b/chrome/browser/task_manager/sampling/task_group.h
index 7768367888b9d77d600d185910b74962ae51a828..1f7e7d9d4789696c01eaa46e817ce700c97dd36a 100644
--- a/chrome/browser/task_manager/sampling/task_group.h
+++ b/chrome/browser/task_manager/sampling/task_group.h
@@ -83,6 +83,9 @@ class TaskGroup {
   int64_t per_process_network_usage() const {
     return per_process_network_usage_;
   }
+  int64_t total_per_process_network_usage() const {
+    return total_per_process_network_usage_;
+  }
   bool is_backgrounded() const { return is_backgrounded_; }
 
 #if defined(OS_WIN)
@@ -163,6 +166,11 @@ class TaskGroup {
   // The network usage in bytes per second as the sum of all network usages of
   // the individual tasks sharing the same process.
   int64_t per_process_network_usage_;
+
+  // The  total(sum) network usage in bytes per second as the sum of all
+  // network usages of the individual tasks sharing the same process.
+  int64_t total_per_process_network_usage_;
+
 #if defined(OS_WIN)
   // Windows GDI and USER Handles.
   int64_t gdi_current_handles_;