Show all system process in the task_manager.

chrome/browser/task_management/providers/arc/arc_process_task_provider.h

Index: chrome/browser/task_management/providers/arc/arc_process_task_provider.h
diff --git a/chrome/browser/task_management/providers/arc/arc_process_task_provider.h b/chrome/browser/task_management/providers/arc/arc_process_task_provider.h
index 49aea04da738d12d397c8de67d9cf4aa3c7b1565..5a7f5242e30461d53c0ad0bf874e20b62300b274 100644
--- a/chrome/browser/task_management/providers/arc/arc_process_task_provider.h
+++ b/chrome/browser/task_management/providers/arc/arc_process_task_provider.h
@@ -11,6 +11,7 @@
 #include <string>
 #include <vector>
 
+#include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/process/process.h"
@@ -40,18 +41,29 @@ class ArcProcessTaskProvider : public TaskProvider {
                             int route_id) override;
 
  private:
+  using ArcTaskMap =
+      std::unordered_map<base::ProcessId, std::unique_ptr<ArcProcessTask>>;
+  void ScheduleNextRequest(const base::Closure& task, const int delaySeconds);
+
   // Auto-retry if ARC bridge service is not ready.
-  void RequestProcessList();
+  void RequestAppProcessList();
+  void RequestSystemProcessList();
 
-  void OnUpdateProcessList(const std::vector<arc::ArcProcess>& processes);
+  void UpdateProcessList(
+      ArcTaskMap* pid_to_task,
+      const std::vector<arc::ArcProcess>& processes);
+  void OnUpdateAppProcessList(const std::vector<arc::ArcProcess>& processes);
+  void OnUpdateSystemProcessList(const std::vector<arc::ArcProcess>& processes);
 
   // task_management::TaskProvider:
   void StartUpdating() override;
   void StopUpdating() override;
 
-  void ScheduleNextRequest();
+  void ScheduleNextAppRequest();
+  void ScheduleNextSystemRequest();
 
-  std::map<base::ProcessId, std::unique_ptr<ArcProcessTask>> nspid_to_task_;
+  ArcTaskMap nspid_to_task_;
+  ArcTaskMap nspid_to_sys_task_;
 
   // Whether to continue the periodical polling.
   bool is_updating_;