[DevTools] Add configuration parameter to Page.setTouchEmulationEnabled.

Source/devtools/protocol.json

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications."
@@ skipping 462 matching lines @@
             },
             {
                 "name": "clearDeviceOrientationOverride",
                 "description": "Clears the overridden Device Orientation.",
                 "redirect": "DeviceOrientation",
                 "hidden": true
             },
             {
                 "name": "setTouchEmulationEnabled",
                 "parameters": [
-                    { "name": "enabled", "type": "boolean", "description": "Whether the touch event emulation should be enabled." }
+                    { "name": "enabled", "type": "boolean", "description": "Whether the touch event emulation should be enabled." },
+                    { "name": "configuration", "type": "string", "enum": ["mobile", "desktop"], "optional": true, "description": "Touch/gesture events configuration. Default: current platform." }
                 ],
                 "description": "Toggles mouse event-based touch event emulation.",
                 "hidden": true,
                 "handlers": ["browser", "renderer"]
             },
             {
                 "name": "setEmulatedMedia",
                 "parameters": [
                     { "name": "media", "type": "string", "description": "Media type to emulate. Empty string disables the override." }
                 ],
@@ skipping 4039 matching lines @@
                     { "name": "isRunning", "type": "boolean", "description": "If the animation player is still running." }
                 ],
                 "description": "Gets the state of an AnimationPlayer.",
                 "hidden": true
             }
         ],
         "events": [
         ]
     }]
 }