Add process start time and CPU time columns to task manager

chrome/browser/task_manager/sampling/task_manager_impl.cc

Index: chrome/browser/task_manager/sampling/task_manager_impl.cc
diff --git a/chrome/browser/task_manager/sampling/task_manager_impl.cc b/chrome/browser/task_manager/sampling/task_manager_impl.cc
index 8d12ca5a5bd60b042b9e5627c9f17cc5e8c4200a..37184a955c8aee50a26a246dcb97a11b28150106 100644
--- a/chrome/browser/task_manager/sampling/task_manager_impl.cc
+++ b/chrome/browser/task_manager/sampling/task_manager_impl.cc
@@ -93,6 +93,22 @@ 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();
 }