Add process start time and CPU time columns to task manager

chrome/browser/task_manager/task_manager_interface.h

Index: chrome/browser/task_manager/task_manager_interface.h
diff --git a/chrome/browser/task_manager/task_manager_interface.h b/chrome/browser/task_manager/task_manager_interface.h
index e8faa916cc22c04809376d27414e56ee8c5d1a23..8e5f7b494e5c62d9b71d2fffa45be214256a4e1f 100644
--- a/chrome/browser/task_manager/task_manager_interface.h
+++ b/chrome/browser/task_manager/task_manager_interface.h
@@ -71,6 +71,14 @@ class TaskManagerInterface {
   // |task_id| is running during the current refresh cycle.
   virtual double GetCpuUsage(TaskId task_id) const = 0;
 
+  // returns the start time for the process on which the task
+  // with |task_id| is running.
+  virtual base::Time GetStartTime(TaskId task_id) const = 0;
+
+  // returns the CPU time for the process on which the task
+  // with |task_id| is running during the current refresh cycle.
+  virtual base::TimeDelta GetCpuTime(TaskId task_id) const = 0;
+
   // Returns the current physical/private/shared memory usage of the task with
   // |task_id| in bytes. A value of -1 means no valid value is currently
   // available.