MD Settings: Add mouse settings, update pointer settings

chrome/browser/chromeos/system/input_device_settings_impl_ozone.cc

Index: chrome/browser/chromeos/system/input_device_settings_impl_ozone.cc
diff --git a/chrome/browser/chromeos/system/input_device_settings_impl_ozone.cc b/chrome/browser/chromeos/system/input_device_settings_impl_ozone.cc
index e8f0c1f6e830afa425c5bf0ae979797cefe5b4b5..7fbc9b8b06bb5f6b06cb87223b900da14096605a 100644
--- a/chrome/browser/chromeos/system/input_device_settings_impl_ozone.cc
+++ b/chrome/browser/chromeos/system/input_device_settings_impl_ozone.cc
@@ -186,5 +186,10 @@ void InputDeviceSettings::SetSettingsForTesting(
   g_test_instance = test_settings;
 }
 
+// static
+bool InputDeviceSettings::DidSetSettingsForTesting() {
+  return g_test_instance;
+}
+
 }  // namespace system
 }  // namespace chromeos