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 3983d5e6f72a7f9dc954e1f42c0cb06ad2d0c651..d51586f8f61818d7c3b35365330d22703532349d 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);
@@ -356,6 +362,7 @@ void TaskManagerView::Init() {
       IDS_TASK_MANAGER_JAVASCRIPT_MEMORY_ALLOCATED_COLUMN, 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);