Remove unnecessary instrumentation for several jank bugs.

chrome/browser/task_manager/task_manager.cc

Index: chrome/browser/task_manager/task_manager.cc
diff --git a/chrome/browser/task_manager/task_manager.cc b/chrome/browser/task_manager/task_manager.cc
index c9df8ec2b9bfebfe96682c4800f78fbc2d308579..9ca0de7e0552f48582b50ce9ef86ec50af5c15d9 100644
--- a/chrome/browser/task_manager/task_manager.cc
+++ b/chrome/browser/task_manager/task_manager.cc
@@ -242,79 +242,32 @@ TaskManagerModel::TaskManagerModel(TaskManager* task_manager)
       listen_requests_(0),
       update_state_(IDLE),
       is_updating_byte_count_(false) {
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/437890 is fixed.
-  tracked_objects::ScopedTracker tracking_profile1(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "437890 TaskManagerModel::TaskManagerModel1"));
-
   AddResourceProvider(
       new task_manager::BrowserProcessResourceProvider(task_manager));
-
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/437890 is fixed.
-  tracked_objects::ScopedTracker tracking_profile2(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "437890 TaskManagerModel::TaskManagerModel2"));
-
   AddResourceProvider(new task_manager::WebContentsResourceProvider(
       task_manager,
       scoped_ptr<WebContentsInformation>(
           new task_manager::BackgroundInformation())));
-
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/437890 is fixed.
-  tracked_objects::ScopedTracker tracking_profile3(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "437890 TaskManagerModel::TaskManagerModel3"));
-
   AddResourceProvider(new task_manager::WebContentsResourceProvider(
       task_manager,
       scoped_ptr<WebContentsInformation>(
           new task_manager::TabContentsInformation())));
 #if defined(ENABLE_PRINT_PREVIEW)
-
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/437890 is fixed.
-  tracked_objects::ScopedTracker tracking_profile4(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "437890 TaskManagerModel::TaskManagerModel4"));
-
   AddResourceProvider(new task_manager::WebContentsResourceProvider(
       task_manager,
       scoped_ptr<WebContentsInformation>(
           new task_manager::PrintingInformation())));
 #endif  // ENABLE_PRINT_PREVIEW
-
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/437890 is fixed.
-  tracked_objects::ScopedTracker tracking_profile5(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "437890 TaskManagerModel::TaskManagerModel5"));
-
   AddResourceProvider(new task_manager::WebContentsResourceProvider(
       task_manager,
       scoped_ptr<WebContentsInformation>(
           new task_manager::PanelInformation())));
-
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/437890 is fixed.
-  tracked_objects::ScopedTracker tracking_profile6(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "437890 TaskManagerModel::TaskManagerModel6"));
-
   AddResourceProvider(
       new task_manager::ChildProcessResourceProvider(task_manager));
-
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/437890 is fixed.
-  tracked_objects::ScopedTracker tracking_profile7(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "437890 TaskManagerModel::TaskManagerModel7"));
-
   AddResourceProvider(new task_manager::WebContentsResourceProvider(
       task_manager,
       scoped_ptr<WebContentsInformation>(
           new task_manager::ExtensionInformation())));
-
-  // TODO(vadimt): Remove ScopedTracker below once crbug.com/437890 is fixed.
-  tracked_objects::ScopedTracker tracking_profile8(
-      FROM_HERE_WITH_EXPLICIT_FUNCTION(
-          "437890 TaskManagerModel::TaskManagerModel8"));
-
   AddResourceProvider(new task_manager::WebContentsResourceProvider(
       task_manager,
       scoped_ptr<WebContentsInformation>(