Add a task manager column that shows memory state of processes

chrome/browser/task_manager/task_manager_interface.h

Index: chrome/browser/task_manager/task_manager_interface.h
diff --git a/chrome/browser/task_manager/task_manager_interface.h b/chrome/browser/task_manager/task_manager_interface.h
index e8faa916cc22c04809376d27414e56ee8c5d1a23..564522942cbbd923b745f1c237891d5370b524d5 100644
--- a/chrome/browser/task_manager/task_manager_interface.h
+++ b/chrome/browser/task_manager/task_manager_interface.h
@@ -12,6 +12,7 @@
 #include <utility>
 
 #include "base/macros.h"
+#include "base/memory/memory_coordinator_client.h"
 #include "base/observer_list.h"
 #include "base/process/kill.h"
 #include "base/process/process_handle.h"
@@ -86,6 +87,9 @@ class TaskManagerInterface {
   virtual int64_t GetGpuMemoryUsage(TaskId task_id,
                                     bool* has_duplicates) const = 0;
 
+  // Returns the memory state of the task with |task_id|.
+  virtual base::MemoryState GetMemoryState(TaskId task_id) const = 0;
+
   // Returns the number of average idle CPU wakeups per second since the last
   // refresh cycle. A value of -1 means no valid value is currently available.
   virtual int GetIdleWakeupsPerSecond(TaskId task_id) const = 0;