Make Interaction Media Features MQ dynamic on Linux.

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 <stddef.h>
 
@@ skipping 313 matching lines @@
 
     if (converter->type() == InputDeviceType::INPUT_DEVICE_INTERNAL &&
         converter->HasKeyboard()) {
       converter->SetKeyFilter(
           input_device_settings_.enable_internal_keyboard_filter,
           input_device_settings_.internal_keyboard_allowed_keys);
     }
 
     converter->SetTouchEventLoggingEnabled(
         input_device_settings_.touch_event_logging_enabled);
+
+    UpdateDirtyFlags(converter);

[spang, 2017/05/10 16:03:41]

Please update dirtiness conservatively - that's the purpose of tracking
dirtiness. If nothing changed, it's not dirty.

As-is, this will cause hotplug notifications to chrome for every device on the
system, every time the configuration changes.

   }
+  NotifyDevicesUpdated();
 }
 
 void InputDeviceFactoryEvdev::ApplyCapsLockLed() {
   for (const auto& it : converters_) {
     EventConverterEvdev* converter = it.second.get();
     converter->SetCapsLockLed(caps_lock_led_enabled_);
   }
 }
 
 bool InputDeviceFactoryEvdev::IsDeviceEnabled(
@@ skipping 151 matching lines @@
   if (enabled == palm_suppression_enabled_)
     return;
   palm_suppression_enabled_ = enabled;
 
   for (const auto& it : converters_) {
     it.second->SetEnabled(IsDeviceEnabled(it.second.get()));
   }
 }
 
 }  // namespace ui