Add text autosizing override in the inspector.

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 35 matching lines @@
     WebInspector.settings.overrideGeolocation.addChangeListener(this._geolocationPositionChanged, this);
     WebInspector.settings.geolocationOverride.addChangeListener(this._geolocationPositionChanged, this);
 
     WebInspector.settings.overrideDeviceOrientation.addChangeListener(this._deviceOrientationChanged, this);
     WebInspector.settings.deviceOrientationOverride.addChangeListener(this._deviceOrientationChanged, this);
 
     WebInspector.settings.emulateTouchEvents.addChangeListener(this._emulateTouchEventsChanged, this);
 
     WebInspector.settings.overrideCSSMedia.addChangeListener(this._cssMediaChanged, this);
     WebInspector.settings.emulatedCSSMedia.addChangeListener(this._cssMediaChanged, this);
+
+    WebInspector.settings.overrideTextAutosizing.addChangeListener(this._textAutosizingChanged, this);
+    WebInspector.settings.enableTextAutosizing.addChangeListener(this._textAutosizingChanged, this);
 }
 
 /**
  * @constructor
  * @param {number} width
  * @param {number} height
  * @param {number} fontScaleFactor
  */
 WebInspector.OverridesSupport.DeviceMetrics = function(width, height, fontScaleFactor)
 {
@@ skipping 263 matching lines @@
     },
 
     _updateAllOverrides: function()
     {
         this._userAgentChanged();
         this._deviceMetricsChanged();
         this._deviceOrientationChanged();
         this._geolocationPositionChanged();
         this._emulateTouchEventsChanged();
         this._cssMediaChanged();
+        this._textAutosizingChanged();
     },
 
     _userAgentChanged: function()
     {
         NetworkAgent.setUserAgentOverride(this._overridesActive && WebInspector.settings.overrideUserAgent.get() ? WebInspector.settings.userAgent.get() : "");
     },
 
     _deviceMetricsChanged: function()
     {
         var metrics = WebInspector.OverridesSupport.DeviceMetrics.parseSetting(this._overridesActive && WebInspector.settings.overrideDeviceMetrics.get() ? WebInspector.settings.deviceMetrics.get() : "");
@@ skipping 26 matching lines @@
 
     _emulateTouchEventsChanged: function()
     {
         WebInspector.domAgent.emulateTouchEventObjects(this._overridesActive && WebInspector.settings.emulateTouchEvents.get());
     },
 
     _cssMediaChanged: function()
     {
         PageAgent.setEmulatedMedia(this._overridesActive && WebInspector.settings.overrideCSSMedia.get() ? WebInspector.settings.emulatedCSSMedia.get() : "");
         WebInspector.cssModel.mediaQueryResultChanged();
+    },
+
+    _textAutosizingChanged: function()
+    {
+        if (!this._overridesActive || !WebInspector.settings.overrideTextAutosizing.get()) {
+            PageAgent.clearTextAutosizingOverride();
+            return;
+        }
+        PageAgent.setTextAutosizingOverride(WebInspector.settings.enableTextAutosizing.get());
     }
 }
 
 
 /**
  * @type {WebInspector.OverridesSupport}
  */
 WebInspector.overridesSupport;