Add process start time and CPU time columns to task manager

chrome/browser/task_manager/test_task_manager.h

Index: chrome/browser/task_manager/test_task_manager.h
diff --git a/chrome/browser/task_manager/test_task_manager.h b/chrome/browser/task_manager/test_task_manager.h
index a023fb0863e2f49f6ae7172c678ffb9458a18936..f72f705ebb66f3946e62a54a8ced0917bcdfb387 100644
--- a/chrome/browser/task_manager/test_task_manager.h
+++ b/chrome/browser/task_manager/test_task_manager.h
@@ -9,6 +9,7 @@
 #include <stdint.h>
 
 #include "base/macros.h"
+#include "base/time/time.h"
 #include "base/timer/mock_timer.h"
 #include "chrome/browser/task_manager/task_manager_interface.h"
 
@@ -26,6 +27,8 @@ class TestTaskManager : public TaskManagerInterface {
   bool IsTaskKillable(TaskId task_id) override;
   void KillTask(TaskId task_id) override;
   double GetCpuUsage(TaskId task_id) const override;
+  base::Time GetStartTime(TaskId task_id) const override;
+  base::TimeDelta GetCpuTime(TaskId task_id) const override;
   int64_t GetPhysicalMemoryUsage(TaskId task_id) const override;
   int64_t GetPrivateMemoryUsage(TaskId task_id) const override;
   int64_t GetSharedMemoryUsage(TaskId task_id) const override;