Add process start time and CPU time columns to task manager

chrome/browser/task_manager/task_manager_interface.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_INTERFACE_H_
 #define CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_INTERFACE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 49 matching lines @@
   // Activates the task with |task_id| by bringing its container to the front if
   // possible.
   virtual void ActivateTask(TaskId task_id) = 0;
 
   // Returns if the task is killable.
   virtual bool IsTaskKillable(TaskId task_id) = 0;
 
   // Kills the task with |task_id|.
   virtual void KillTask(TaskId task_id) = 0;
 
-  // returns the CPU usage in percent for the process on which the task with
+  // Returns the CPU usage in percent for the process on which the task with
   // |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. Only implemented in Windows now.
+  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.
+  // Only implemented in Windows now.
+  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.
   virtual int64_t GetPhysicalMemoryUsage(TaskId task_id) const = 0;
   virtual int64_t GetPrivateMemoryUsage(TaskId task_id) const = 0;
   virtual int64_t GetSharedMemoryUsage(TaskId task_id) const = 0;
   virtual int64_t GetSwappedMemoryUsage(TaskId task_id) const = 0;
 
   // Returns the GPU memory usage of the task with |task_id| in bytes. A value
   // of -1 means no valid value is currently available.
@@ skipping 186 matching lines @@
 
   // The flags containing the enabled resources types calculations.
   int64_t enabled_resources_flags_;
 
   DISALLOW_COPY_AND_ASSIGN(TaskManagerInterface);
 };
 
 }  // namespace task_manager
 
 #endif  // CHROME_BROWSER_TASK_MANAGER_TASK_MANAGER_INTERFACE_H_