Add text autosizing override in the inspector.

Source/devtools/front_end/OverridesView.js

Index: Source/devtools/front_end/OverridesView.js
diff --git a/Source/devtools/front_end/OverridesView.js b/Source/devtools/front_end/OverridesView.js
index e6074ea8507c44cef7c384924e000730148d59bb..433fd6bacfa5fa5a6919264e6a01c82f1078e4de 100644
--- a/Source/devtools/front_end/OverridesView.js
+++ b/Source/devtools/front_end/OverridesView.js
@@ -75,6 +75,7 @@ WebInspector.OverridesView = function()
     appendBlock([this._createDeviceOrientationOverrideControl()]);
     appendBlock([WebInspector.SettingsTab.createSettingCheckbox(WebInspector.UIString("Emulate touch events"), WebInspector.settings.emulateTouchEvents)]);
     appendBlock([this._createMediaEmulationElement()]);
+    appendBlock([this._createTextAutosizingOverrideControl()]);
     this._setOverridesActive(enableCheckbox.checked);
 
     this._statusElement = document.createElement("span");
@@ -587,5 +588,23 @@ WebInspector.OverridesView.prototype = {
         WebInspector.settings.emulatedCSSMedia.set(media);
     },
 
+    _createTextAutosizingOverrideControl: function()
+    {
+        var overrideCheckbox = WebInspector.SettingsTab.createSettingCheckbox(WebInspector.UIString("Override text autosizing"), WebInspector.settings.overrideTextAutosizing);
+        var fieldsetElement = WebInspector.SettingsTab.createSettingFieldset(WebInspector.settings.overrideTextAutosizing);
+        overrideCheckbox.appendChild(fieldsetElement);
+
+        var enableTextAutosizingCheckbox = WebInspector.SettingsTab.createSettingCheckbox(WebInspector.UIString("Enable text autosizing"), WebInspector.settings.enableTextAutosizing);
+        fieldsetElement.appendChild(enableTextAutosizingCheckbox);
+
+        enableTextAutosizingCheckbox.addEventListener("change", this._enableTextAutosizingChanged.bind(this, enableTextAutosizingCheckbox.checked), false);
+        return overrideCheckbox;
+    },
+
+    _enableTextAutosizingChanged: function(enable)
+    {
+        WebInspector.settings.enableTextAutosizing.set(enable);
+    },
+
     __proto__: WebInspector.View.prototype
 }