[Part 5 of 6] Move TaskManagerTester to the task_management directory.

chrome/browser/ui/task_manager/task_manager_table_model.h

Index: chrome/browser/ui/task_manager/task_manager_table_model.h
diff --git a/chrome/browser/ui/task_manager/task_manager_table_model.h b/chrome/browser/ui/task_manager/task_manager_table_model.h
index ef4b352c4ccb2cea3232048b75c98f8b0b7864cf..8ee8e9b260ad0b2e6b97b5e9e4632d6932ba688d 100644
--- a/chrome/browser/ui/task_manager/task_manager_table_model.h
+++ b/chrome/browser/ui/task_manager/task_manager_table_model.h
@@ -14,12 +14,6 @@
 #include "chrome/browser/task_management/task_manager_observer.h"
 #include "ui/base/models/table_model.h"
 
-namespace task_manager {
-namespace browsertest_util {
-class TaskManagerTesterImpl;
-}
-}
-
 namespace task_management {
 
 class TaskManagerValuesStringifier;
@@ -107,7 +101,7 @@ class TaskManagerTableModel
   void ToggleColumnVisibility(int column_id);
 
  private:
-  friend class task_manager::browsertest_util::TaskManagerTesterImpl;
+  friend class TaskManagerTesterImpl;
 
   // Start / stop observing the task manager.
   void StartUpdating();