Add an 'Idle Wake Ups' metric to the Linux task manager, implement backend.

chrome/browser/ui/views/task_manager_view.cc

Index: chrome/browser/ui/views/task_manager_view.cc
diff --git a/chrome/browser/ui/views/task_manager_view.cc b/chrome/browser/ui/views/task_manager_view.cc
index f0070955574131fc339fdc46b0f6097faf14f188..3b49a3f277609fb819ce3c360b8f9a4a64c0c273 100644
--- a/chrome/browser/ui/views/task_manager_view.cc
+++ b/chrome/browser/ui/views/task_manager_view.cc
@@ -331,6 +331,12 @@ void TaskManagerView::Init() {
       ui::TableColumn(IDS_TASK_MANAGER_JAVASCRIPT_MEMORY_ALLOCATED_COLUMN,
                       ui::TableColumn::RIGHT, -1, 0));
   columns_.back().sortable = true;
+  // TODO(port) http://crbug.com/120488 for non-Linux.
+#if defined(OS_LINUX)
+  columns_.push_back(ui::TableColumn(IDS_TASK_MANAGER_IDLE_WAKEUPS_COLUMN,
+                                     ui::TableColumn::RIGHT, -1, 0));
+  columns_.back().sortable = true;
+#endif
 
   tab_table_ = new views::TableView(
       table_model_.get(), columns_, views::ICON_AND_TEXT, false);
@@ -358,6 +364,7 @@ void TaskManagerView::Init() {
                                   false);
   tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_GDI_HANDLES_COLUMN, false);
   tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_USER_HANDLES_COLUMN, false);
+  tab_table_->SetColumnVisibility(IDS_TASK_MANAGER_IDLE_WAKEUPS_COLUMN, false);
 
   UpdateStatsCounters();
   tab_table_->SetObserver(this);