Task Manager Should remember the most recently enabled columns.

chrome/common/pref_names.cc

 // 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/common/pref_names.h"
 
 #include "base/basictypes.h"
 #include "chrome/common/pref_font_webkit_names.h"
 
 namespace prefs {
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 // window to restore on startup.
 const char kBrowserWindowPlacement[] = "browser.window_placement";
 
 // Browser window placement for popup windows.
 const char kBrowserWindowPlacementPopup[] = "browser.window_placement_popup";
 
 // A collection of position, size, and other data relating to the task
 // manager window to restore on startup.
 const char kTaskManagerWindowPlacement[] = "task_manager.window_placement";
 
+// The most recent stored column visibility of the task manager table to be
+// restored on startup.
+const char kTaskManagerColumnVisibility[] = "task_manager.column_visibility";
+
 // A collection of position, size, and other data relating to app windows to
 // restore on startup.
 const char kAppWindowPlacement[] = "browser.app_window_placement";
 
 // String which specifies where to download files to by default.
 const char kDownloadDefaultDirectory[] = "download.default_directory";
 
 // Boolean that records if the download directory was changed by an
 // upgrade a unsafe location to a safe location.
 const char kDownloadDirUpgraded[] = "download.directory_upgrade";
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     "supervised_users.whitelists";
 
 #if defined(ENABLE_EXTENSIONS)
 // Policy that indicates how to handle animated images.
 const char kAnimationPolicy[] = "settings.a11y.animation_policy";
 #endif
 
 const char kBackgroundTracingLastUpload[] = "background_tracing.last_upload";
 
 }  // namespace prefs