ozone: evdev: Make sure to device list update during startup scan

ui/events/ozone/evdev/input_device_factory_evdev.cc

 // Copyright 2015 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/events/ozone/evdev/input_device_factory_evdev.h"
 
 #include <fcntl.h>
 #include <linux/input.h>
 
 #include "base/stl_util.h"
@@ skipping 232 matching lines @@
     // Add initialized device to map.
     converters_[path] = converter.release();
     converters_[path]->Start();
     UpdateDirtyFlags(converters_[path]);
 
     // Sync settings to new device.
     ApplyInputDeviceSettings();
     ApplyCapsLockLed();
   }
 
-  if (--pending_device_changes_ == 0)
-    NotifyDevicesUpdated();
+  --pending_device_changes_;
+  NotifyDevicesUpdated();
 }
 
 void InputDeviceFactoryEvdev::DetachInputDevice(const base::FilePath& path) {
   TRACE_EVENT1("evdev", "DetachInputDevice", "path", path.value());
   DCHECK(task_runner_->RunsTasksOnCurrentThread());
 
   // Remove device from map.
   scoped_ptr<EventConverterEvdev> converter(converters_[path]);
   converters_.erase(path);
 
@@ skipping 133 matching lines @@
     keyboard_list_dirty_ = true;
 
   if (converter->HasMouse())
     mouse_list_dirty_ = true;
 
   if (converter->HasTouchpad())
     touchpad_list_dirty_ = true;
 }
 
 void InputDeviceFactoryEvdev::NotifyDevicesUpdated() {
+  if (pending_device_changes_)
+    return;  // No update until pending opens complete.
   if (touchscreen_list_dirty_)
     NotifyTouchscreensUpdated();
   if (keyboard_list_dirty_)
     NotifyKeyboardsUpdated();
   if (mouse_list_dirty_)
     NotifyMouseDevicesUpdated();
   if (touchpad_list_dirty_)
     NotifyTouchpadDevicesUpdated();
   touchscreen_list_dirty_ = false;
   keyboard_list_dirty_ = false;
@@ skipping 71 matching lines @@
   std::vector<int> ids;
   gesture_property_provider_->GetDeviceIdsByType(type, &ids);
   for (size_t i = 0; i < ids.size(); ++i) {
     SetGestureBoolProperty(gesture_property_provider_.get(), ids[i], name,
                            value);
   }
 #endif
 }
 
 }  // namespace ui