Add a task manager column that shows memory state of processes

chrome/browser/task_manager/test_task_manager.cc

Index: chrome/browser/task_manager/test_task_manager.cc
diff --git a/chrome/browser/task_manager/test_task_manager.cc b/chrome/browser/task_manager/test_task_manager.cc
index c0fab6da98298d6f23a6e64199eaa4e8099522a7..14ec3d900dad2f639f92a066eae00423a42d79f2 100644
--- a/chrome/browser/task_manager/test_task_manager.cc
+++ b/chrome/browser/task_manager/test_task_manager.cc
@@ -51,6 +51,10 @@ int64_t TestTaskManager::GetGpuMemoryUsage(TaskId task_id,
   return -1;
 }
 
+base::MemoryState TestTaskManager::GetMemoryState(TaskId task_id) const {
+  return base::MemoryState::UNKNOWN;
+}
+
 int TestTaskManager::GetIdleWakeupsPerSecond(TaskId task_id) const {
   return -1;
 }