Add a task manager column that shows memory state of processes

chrome/browser/task_manager/task_manager_tester.h

Index: chrome/browser/task_manager/task_manager_tester.h
diff --git a/chrome/browser/task_manager/task_manager_tester.h b/chrome/browser/task_manager/task_manager_tester.h
index 94d075f43069ba9ee675bebbe35c5fdb7ead4cf7..d762beb99e6006a5291480f5a6a33b02cc73f49b 100644
--- a/chrome/browser/task_manager/task_manager_tester.h
+++ b/chrome/browser/task_manager/task_manager_tester.h
@@ -10,6 +10,7 @@
 #include <memory>
 
 #include "base/callback_forward.h"
+#include "base/memory/memory_coordinator_client.h"
 #include "base/strings/string16.h"
 #include "chrome/browser/task_manager/task_manager_browsertest_util.h"
 
@@ -50,6 +51,9 @@ class TaskManagerTester {
   // return -1.
   int32_t GetTabId(int row);
 
+  // Return the memory state of the process which is associated with |row|.
+  base::MemoryState GetMemoryState(int row);
+
   // Kill the process of |row|.
   void Kill(int row);