Mac Task Manager: Don't deselect rows before reloading data.

chrome/browser/ui/cocoa/task_manager_mac.mm

 // Copyright (c) 2012 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/cocoa/task_manager_mac.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <vector>
@@ skipping 132 matching lines @@
           selectedItem -= removedRows;
         else
           selectedItem = -1;  // The item was removed.
       }
     }
   }
 
   // Sort.
   [self sortShuffleArray];
 
-  // Clear the selection and reload the NSTableView. Note that it is important
-  // to clear the selection before reloading the data, and to reload the
-  // selection after reloading the data, because otherwise the table will adjust
-  // the selection in ways that are not desirable.
-  [tableView_ deselectAll:nil];
+  // Reload the data.
   [tableView_ reloadData];
 
   // Reload the selection.
   NSMutableIndexSet* indexSet = [NSMutableIndexSet indexSet];
   for (auto selectedItem : modelSelection) {
     if (selectedItem != -1)
       [indexSet addIndex:modelToViewMap_[selectedItem]];
   }
   [tableView_ selectRowIndexes:indexSet byExtendingSelection:NO];
 
@@ skipping 484 matching lines @@
 void HideTaskManager() {
   if (chrome::ToolkitViewsDialogsEnabled()) {
     chrome::HideTaskManagerViews();
     return;
   }
 
   task_manager::TaskManagerMac::Hide();
 }
 
 }  // namespace chrome