Add process start time and CPU time columns to task manager

chrome/browser/task_manager/sampling/task_manager_impl.cc

 // 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.
 
 #include "chrome/browser/task_manager/sampling/task_manager_impl.h"
 
 #include <algorithm>
 #include <string>
 #include <unordered_map>
 #include <unordered_set>
@@ skipping 75 matching lines @@
 }
 
 void TaskManagerImpl::KillTask(TaskId task_id) {
   GetTaskByTaskId(task_id)->Kill();
 }
 
 double TaskManagerImpl::GetCpuUsage(TaskId task_id) const {
   return GetTaskGroupByTaskId(task_id)->cpu_usage();
 }
 
+base::Time TaskManagerImpl::GetStartTime(TaskId task_id) const {
+#if defined(OS_WIN)
+  return GetTaskGroupByTaskId(task_id)->start_time();
+#else

[afakhry, 2017/01/09 21:03:43]

Nit: Can you please add a NOTIMPLEMENTED(); here?

[chengx, 2017/01/10 00:39:27]

Done.

+  return base::Time();
+#endif
+}
+
+base::TimeDelta TaskManagerImpl::GetCpuTime(TaskId task_id) const {
+#if defined(OS_WIN)
+  return GetTaskGroupByTaskId(task_id)->cpu_time();
+#else

[afakhry, 2017/01/09 21:03:42]

Here too?

[chengx, 2017/01/10 00:39:27]

Done.

+  return base::TimeDelta();
+#endif
+}
+
 int64_t TaskManagerImpl::GetPhysicalMemoryUsage(TaskId task_id) const {
   return GetTaskGroupByTaskId(task_id)->physical_bytes();
 }
 
 int64_t TaskManagerImpl::GetPrivateMemoryUsage(TaskId task_id) const {
   return GetTaskGroupByTaskId(task_id)->private_bytes();
 }
 
 int64_t TaskManagerImpl::GetSharedMemoryUsage(TaskId task_id) const {
   return GetTaskGroupByTaskId(task_id)->shared_bytes();
@@ skipping 434 matching lines @@
         groups_itr.second->AreBackgroundCalculationsDone();
   }
   if (are_all_processes_data_ready) {
     NotifyObserversOnRefreshWithBackgroundCalculations(GetTaskIdsList());
     for (const auto& groups_itr : task_groups_by_proc_id_)
       groups_itr.second->ClearCurrentBackgroundCalculationsFlags();
   }
 }
 
 }  // namespace task_manager