Allow moving cursors between connected displays.

chrome/browser/chromeos/display/display_preferences.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/browser/chromeos/display/display_preferences.h"
 
 #include <stddef.h>
 
 #include "ash/display/display_layout_store.h"
 #include "ash/display/display_manager.h"
@@ skipping 109 matching lines @@
        !it.IsAtEnd(); it.Advance()) {
     scoped_ptr<ash::DisplayLayout> layout(new ash::DisplayLayout);
     if (!ash::JsonToDisplayLayout(it.value(), layout.get())) {
       LOG(WARNING) << "Invalid preference value for " << it.key();
       continue;
     }
 
     if (it.key().find(",") != std::string::npos) {
       std::vector<std::string> ids_str = base::SplitString(
           it.key(), ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
-      int64_t id1 = gfx::Display::kInvalidDisplayID;
-      int64_t id2 = gfx::Display::kInvalidDisplayID;
-      if (!base::StringToInt64(ids_str[0], &id1) ||
-          !base::StringToInt64(ids_str[1], &id2) ||
-          id1 == gfx::Display::kInvalidDisplayID ||
-          id2 == gfx::Display::kInvalidDisplayID) {
-        continue;
+      std::vector<int64_t> ids;
+      for (std::string id_str : ids_str) {
+        int64_t id;
+        if (!base::StringToInt64(id_str, &id))
+          continue;
+        ids.push_back(id);
       }
-      int64_t ids[] = {id1, id2};
       ash::DisplayIdList list =
-          ash::GenerateDisplayIdList(std::begin(ids), std::end(ids));
+          ash::GenerateDisplayIdList(ids.begin(), ids.end());
       layout_store->RegisterLayoutForDisplayIdList(list, std::move(layout));
     }
   }
 }
 
 void LoadDisplayProperties() {
   PrefService* local_state = g_browser_process->local_state();
   const base::DictionaryValue* properties = local_state->GetDictionary(
       prefs::kDisplayProperties);
   for (base::DictionaryValue::Iterator it(*properties);
@@ skipping 246 matching lines @@
                                    const ash::DisplayLayout& layout) {
   StoreDisplayLayoutPref(list, layout);
 }
 
 // Stores the given |power_state|.
 void StoreDisplayPowerStateForTest(DisplayPowerState power_state) {
   StoreDisplayPowerState(power_state);
 }
 
 }  // namespace chromeos