Port Chromium OS touch noise filtering to Chromium

ui/events/event_switches.cc

 // Copyright 2013 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/event_switches.h"
 
 namespace switches {
 
 // Enable scroll prediction for scroll update events.
 const char kEnableScrollPrediction[] = "enable-scroll-prediction";
@@ skipping 17 matching lines @@
     "compensate-for-unstable-pinch-zoom";
 
 #if defined(OS_LINUX)
 // Tells chrome to interpret events from these devices as touch events. Only
 // available with XInput 2 (i.e. X server 1.8 or above). The id's of the
 // devices can be retrieved from 'xinput list'.
 const char kTouchDevices[] = "touch-devices";
 #endif
 
 #if defined(USE_X11) || defined(USE_OZONE)
+// Tells Chrome to do additional touch noise filtering. Should only be used if
+// the driver level filtering is insufficient.
+const char kExtraTouchNoiseFiltering[] = "touch-noise-filtering";
+
 // The calibration factors given as "<left>,<right>,<top>,<bottom>".
 const char kTouchCalibration[] = "touch-calibration";
 #endif
 
 }  // namespace switches