Port Chromium OS touch noise filtering to Chromium

ui/events/event_switches.cc

Index: ui/events/event_switches.cc
diff --git a/ui/events/event_switches.cc b/ui/events/event_switches.cc
index 4e4405e174940de89301021c71202efc3f46710f..dcc001475dcfa87c627a4629dce8384be275620c 100644
--- a/ui/events/event_switches.cc
+++ b/ui/events/event_switches.cc
@@ -35,6 +35,10 @@ 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