[DevTools] Disable touch emulation on devices with touch input.

Source/devtools/front_end/OverridesSupport.js

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 50 matching lines @@
 }
 
 /**
  * @return {boolean}
  */
 WebInspector.OverridesSupport.isInspectingDevice = function()
 {
     return !!WebInspector.queryParam("remoteFrontend");
 }
 
+/**
+ * @return {boolean}
+ */
+WebInspector.OverridesSupport.hasTouchInputs = function()
+{
+    var target = WebInspector.targetManager.mainTarget();

[pfeldman, 2014/04/18 16:23:15]

There is no main target. Please use activeTarget for now.

+    return !!target && target.hasTouchInputs;
+}
+
 WebInspector.OverridesSupport.Events = {
     OverridesWarningUpdated: "OverridesWarningUpdated",
     HasActiveOverridesChanged: "HasActiveOverridesChanged",
 }
 
 /**
  * @constructor
  * @param {number} width
  * @param {number} height
  * @param {number} deviceScaleFactor
@@ skipping 439 matching lines @@
             return;
         }
 
         var deviceOrientation = WebInspector.OverridesSupport.DeviceOrientation.parseSetting(WebInspector.settings.deviceOrientationOverride.get());
         PageAgent.setDeviceOrientationOverride(deviceOrientation.alpha, deviceOrientation.beta, deviceOrientation.gamma);
         this.maybeHasActiveOverridesChanged();
     },
 
     _emulateTouchEventsChanged: function()
     {
-        if (WebInspector.OverridesSupport.isInspectingDevice() && WebInspector.settings.emulateTouchEvents.get())
+        if (WebInspector.OverridesSupport.hasTouchInputs() && WebInspector.settings.emulateTouchEvents.get())
             return;
 
         var emulateTouch = WebInspector.settings.emulateTouchEvents.get();
         var targets = WebInspector.targetManager.targets();
         for (var i = 0; i < targets.length; ++i)
             targets[i].domModel.emulateTouchEventObjects(emulateTouch);
         this.maybeHasActiveOverridesChanged();
     },
 
     _cssMediaChanged: function()
@@ skipping 57 matching lines @@
     },
 
     __proto__: WebInspector.Object.prototype
 }
 
 
 /**
  * @type {!WebInspector.OverridesSupport}
  */
 WebInspector.overridesSupport;