Add a task manager column that shows memory state of processes

chrome/browser/task_manager/sampling/task_manager_impl.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/task_manager/sampling/task_manager_impl.h"
 
 #include <algorithm>
 #include <string>
 #include <unordered_map>
 #include <unordered_set>
@@ skipping 103 matching lines @@
 }
 
 int64_t TaskManagerImpl::GetGpuMemoryUsage(TaskId task_id,
                                            bool* has_duplicates) const {
   const TaskGroup* task_group = GetTaskGroupByTaskId(task_id);
   if (has_duplicates)
     *has_duplicates = task_group->gpu_memory_has_duplicates();
   return task_group->gpu_memory();
 }
 
+base::MemoryState TaskManagerImpl::GetMemoryState(TaskId task_id) const {
+  return GetTaskGroupByTaskId(task_id)->memory_state();
+}
+
 int TaskManagerImpl::GetIdleWakeupsPerSecond(TaskId task_id) const {
   return GetTaskGroupByTaskId(task_id)->idle_wakeups_per_second();
 }
 
 int TaskManagerImpl::GetNaClDebugStubPort(TaskId task_id) const {
 #if !defined(DISABLE_NACL)
   return GetTaskGroupByTaskId(task_id)->nacl_debug_stub_port();
 #else
   return -2;
 #endif  // !defined(DISABLE_NACL)
@@ skipping 406 matching lines @@
         groups_itr.second->AreBackgroundCalculationsDone();
   }
   if (are_all_processes_data_ready) {
     NotifyObserversOnRefreshWithBackgroundCalculations(GetTaskIdsList());
     for (const auto& groups_itr : task_groups_by_proc_id_)
       groups_itr.second->ClearCurrentBackgroundCalculationsFlags();
   }
 }
 
 }  // namespace task_manager