Add process start time and CPU time columns to task manager

chrome/browser/task_manager/test_task_manager.cc

Index: chrome/browser/task_manager/test_task_manager.cc
diff --git a/chrome/browser/task_manager/test_task_manager.cc b/chrome/browser/task_manager/test_task_manager.cc
index 14ec3d900dad2f639f92a066eae00423a42d79f2..89ba2c4e3ca615fcec7c3aada60d45e9c5b4f3f2 100644
--- a/chrome/browser/task_manager/test_task_manager.cc
+++ b/chrome/browser/task_manager/test_task_manager.cc
@@ -30,6 +30,14 @@ double TestTaskManager::GetCpuUsage(TaskId task_id) const {
   return 0.0;
 }
 
+base::Time TestTaskManager::GetStartTime(TaskId task_id) const {
+  return base::Time();
+}
+
+base::TimeDelta TestTaskManager::GetCpuTime(TaskId task_id) const {
+  return base::TimeDelta();
+}
+
 int64_t TestTaskManager::GetPhysicalMemoryUsage(TaskId task_id) const {
   return -1;
 }