Allow storing display preferences per device.

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"
 
 namespace prefs {
 
@@ skipping 723 matching lines @@
 //  0 - The secondary display is at the top of the primary display.
 //  1 - The secondary display is at the right of the primary display.
 //  2 - The secondary display is at the bottom of the primary display.
 //  3 - The secondary display is at the left of the primary display.
 // TODO(mukai,oshima): update the format of the multi-display settings.
 const char kSecondaryDisplayLayout[] = "settings.display.secondary_layout";
 
 // An integer pref that specifies how far the secondary display is positioned
 // from the edge of the primary display.
 const char kSecondaryDisplayOffset[] = "settings.display.secondary_offset";
+
+// A dictionary pref that specifies per-display layout/offset information.
+// Its key is the ID of the display and its value is a dictionary for the
+// layout/offset information.
+const char kSecondaryDisplays[] = "settings.display.secondary_displays";
 #endif  // defined(OS_CHROMEOS)
 
 // The disabled messages in IPC logging.
 const char kIpcDisabledMessages[] = "ipc_log_disabled_messages";
 
 // A boolean pref set to true if a Home button to open the Home pages should be
 // visible on the toolbar.
 const char kShowHomeButton[] = "browser.show_home_button";
 
 // A string value which saves short list of recently user selected encodings
@@ skipping 1244 matching lines @@
 
 // Counts how many more times the 'profile on a network share' warning should be
 // shown to the user before the next silence period.
 const char kNetworkProfileWarningsLeft[] = "network_profile.warnings_left";
 // Tracks the time of the last shown warning. Used to reset
 // |network_profile.warnings_left| after a silence period.
 const char kNetworkProfileLastWarningTime[] =
     "network_profile.last_warning_time";
 
 }  // namespace prefs