Handle modified displays in mustash.

ui/display/display_list.cc

 // Copyright 2016 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 "ui/display/display_list.h"
 
 #include "base/memory/ptr_util.h"
 #include "ui/display/display_observer.h"
 
 namespace display {
@@ skipping 42 matching lines @@
     const {
   return primary_display_index_ == -1
              ? displays_.end()
              : displays_.begin() + primary_display_index_;
 }
 
 std::unique_ptr<DisplayListObserverLock> DisplayList::SuspendObserverUpdates() {
   return base::WrapUnique(new DisplayListObserverLock(this));
 }
 
+void DisplayList::UpdateDisplay(const display::Display& display) {
+  UpdateDisplay(display, GetTypeByDisplayId(display.id()));
+}
+
 void DisplayList::UpdateDisplay(const display::Display& display, Type type) {
   auto iter = FindDisplayById(display.id());
   DCHECK(iter != displays_.end());
 
   display::Display* local_display = &(*iter);
   uint32_t changed_values = 0;
   if (type == Type::PRIMARY &&
       static_cast<int>(iter - displays_.begin()) !=
           static_cast<int>(GetPrimaryDisplayIterator() - displays_.begin())) {
     primary_display_index_ = static_cast<int>(iter - displays_.begin());
@@ skipping 57 matching lines @@
 
 void DisplayList::IncrementObserverSuspendLockCount() {
   observer_suspend_lock_count_++;
 }
 
 void DisplayList::DecrementObserverSuspendLockCount() {
   DCHECK_GT(observer_suspend_lock_count_, 0);
   observer_suspend_lock_count_--;
 }
 
+DisplayList::Type DisplayList::GetTypeByDisplayId(int64_t display_id) const {
+  if (primary_display_index_ == -1)
+    return Type::NOT_PRIMARY;
+  return (displays_[primary_display_index_].id() == display_id
+              ? Type::PRIMARY
+              : Type::NOT_PRIMARY);
+}
+
 }  // namespace display