Support for cros touchpad 3-finger click as middle button.

chrome/browser/chromeos/system/input_device_settings.cc

 // Copyright (c) 2012 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 "chrome/browser/chromeos/system/input_device_settings.h"
 
 #include <stdarg.h>
 #include <string>
 #include <vector>
 
@@ skipping 89 matching lines @@
 
 // Sets the touchpad sensitivity in the range [1, 5].
 void SetSensitivity(int value) {
   SetPointerSensitivity(kTpControl, value);
 }
 
 void SetTapToClick(bool enabled) {
   ExecuteScript(3, kTpControl, "taptoclick", enabled ? "on" : "off");
 }
 
+void SetThreeFingerClick(bool enabled) {
+  ExecuteScript(3, kTpControl, "three_finger_click", enabled ? "on" : "off");
+  // For Alex/ZGB.
+  ExecuteScript(3, kTpControl, "t5r2_three_finger_click",
+      enabled ? "on" : "off");
+}
+
 }  // namespace touchpad_settings
 
 namespace mouse_settings {
 
 bool MouseExists() {
   return DeviceExists(kMouseControl);
 }
 
 // Sets the touchpad sensitivity in the range [1, 5].
 void SetSensitivity(int value) {
   SetPointerSensitivity(kMouseControl, value);
 }
 
 void SetPrimaryButtonRight(bool right) {
   ExecuteScript(3, kMouseControl, "swap_left_right", right ? "1" : "0");
 }
 
 }  // namespace mouse_settings
 
 }  // namespace system
 }  // namespace chromeos