Add process start time and CPU time columns to task manager

chrome/browser/ui/task_manager/task_manager_columns.cc

Index: chrome/browser/ui/task_manager/task_manager_columns.cc
diff --git a/chrome/browser/ui/task_manager/task_manager_columns.cc b/chrome/browser/ui/task_manager/task_manager_columns.cc
index 69f9e696ace9fd92443cacb23039c1ff6d76052c..4a08e5e3e5b2ee932eb29f06701d0d3f09712e7b 100644
--- a/chrome/browser/ui/task_manager/task_manager_columns.cc
+++ b/chrome/browser/ui/task_manager/task_manager_columns.cc
@@ -39,6 +39,12 @@ const TableColumnData kColumns[] = {
 
   { IDS_TASK_MANAGER_CPU_COLUMN, ui::TableColumn::RIGHT, -1, 0,
     arraysize("99.9") * kCharWidth, -1, true, false, true },
+#if defined(OS_WIN)
+  { IDS_TASK_MANAGER_CPU_TIME_COLUMN, ui::TableColumn::RIGHT, -1, 0,
+    arraysize("15h 42m 30s") * kCharWidth, -1, true, false, true },

[stanisc, 2016/12/19 22:44:10]

This might be more than 100 hours. I suggest 999h instead.
Also, is this the CPU time format we are using? I thought it was compact format.

[chengx, 2016/12/20 00:51:13]

Good point. I will 1234h just in case. Actually, we have a bug with the compact
format when hour is larger than 24, which is be converted to the value mod by
24. I will fix it in another CL. So for now, I will stay with "15h 42m 30s"
format.

+  { IDS_TASK_MANAGER_START_TIME_COLUMN, ui::TableColumn::RIGHT, -1, 0,
+    arraysize("12/13/14 11:44:30 PM") * kCharWidth, -1, true, false, true },
+#endif
   { IDS_TASK_MANAGER_NET_COLUMN, ui::TableColumn::RIGHT, -1, 0,
     arraysize("150 kiB/s") * kCharWidth, -1, true, false, true },
   { IDS_TASK_MANAGER_PROCESS_ID_COLUMN, ui::TableColumn::RIGHT, -1, 0,
@@ -101,6 +107,8 @@ const char kSortIsAscendingKey[] = "sort_is_ascending";
   def(IDS_TASK_MANAGER_PRIVATE_MEM_COLUMN) \
   def(IDS_TASK_MANAGER_SWAPPED_MEM_COLUMN) \
   def(IDS_TASK_MANAGER_CPU_COLUMN) \
+  def(IDS_TASK_MANAGER_START_TIME_COLUMN) \
+  def(IDS_TASK_MANAGER_CPU_TIME_COLUMN) \
   def(IDS_TASK_MANAGER_NET_COLUMN) \
   def(IDS_TASK_MANAGER_PROCESS_ID_COLUMN) \
   def(IDS_TASK_MANAGER_GDI_HANDLES_COLUMN) \