Task manager: Get physical memory efficiently for all processes from SharedSampler

chrome/browser/ui/task_manager/task_manager_table_model.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/ui/task_manager/task_manager_table_model.h"
 
 #include <stddef.h>
 
 #include "base/command_line.h"
 #include "base/i18n/number_formatting.h"
@@ skipping 618 matching lines @@
 
     case IDS_TASK_MANAGER_NET_COLUMN:
       type = REFRESH_TYPE_NETWORK_USAGE;
       break;
 
     case IDS_TASK_MANAGER_CPU_COLUMN:
       type = REFRESH_TYPE_CPU;
       break;
 
     case IDS_TASK_MANAGER_PHYSICAL_MEM_COLUMN:
+      type = REFRESH_TYPE_PHYSICAL_MEMORY;
+      break;
+
     case IDS_TASK_MANAGER_PRIVATE_MEM_COLUMN:
     case IDS_TASK_MANAGER_SHARED_MEM_COLUMN:
     case IDS_TASK_MANAGER_SWAPPED_MEM_COLUMN:
-      type = REFRESH_TYPE_MEMORY;
+      type = REFRESH_TYPE_MEMORY_DETAILS;
       if (table_view_delegate_->IsColumnVisible(
-              IDS_TASK_MANAGER_PHYSICAL_MEM_COLUMN) ||
-          table_view_delegate_->IsColumnVisible(
               IDS_TASK_MANAGER_PRIVATE_MEM_COLUMN) ||
           table_view_delegate_->IsColumnVisible(
               IDS_TASK_MANAGER_SHARED_MEM_COLUMN) ||
           table_view_delegate_->IsColumnVisible(
               IDS_TASK_MANAGER_SWAPPED_MEM_COLUMN)) {
         new_visibility = true;
       }
       break;
 
     case IDS_TASK_MANAGER_GDI_HANDLES_COLUMN:
@@ skipping 178 matching lines @@
 
 bool TaskManagerTableModel::IsTaskFirstInGroup(int row_index) const {
   if (row_index == 0)
     return true;
 
   return observed_task_manager()->GetProcessId(tasks_[row_index - 1]) !=
       observed_task_manager()->GetProcessId(tasks_[row_index]);
 }
 
 }  // namespace task_manager