[DevTools] Move user agent override to responsive design toolbar.

Source/devtools/front_end/main/AdvancedApp.js

Index: Source/devtools/front_end/main/AdvancedApp.js
diff --git a/Source/devtools/front_end/main/AdvancedApp.js b/Source/devtools/front_end/main/AdvancedApp.js
index 9ffa1d18141553d07baf7f846d332a7e5bce0f21..5b639b76bc0692cbdaf8ec916356861f5df63731 100644
--- a/Source/devtools/front_end/main/AdvancedApp.js
+++ b/Source/devtools/front_end/main/AdvancedApp.js
@@ -14,20 +14,20 @@ WebInspector.AdvancedApp = function()
         return;
 
     this._toggleResponsiveDesignButton = new WebInspector.StatusBarButton(WebInspector.UIString("Responsive design mode."), "responsive-design-status-bar-item");
-    this._toggleResponsiveDesignButton.toggled = WebInspector.settings.responsiveDesignMode.get();
+    this._toggleResponsiveDesignButton.toggled = WebInspector.settings.responsiveDesign.enabled.get();
     this._toggleResponsiveDesignButton.addEventListener("click", this._toggleResponsiveDesign, this);
-    WebInspector.settings.responsiveDesignMode.addChangeListener(this._responsiveDesignModeChanged, this);
+    WebInspector.settings.responsiveDesign.enabled.addChangeListener(this._responsiveDesignEnabledChanged, this);
 };
 
 WebInspector.AdvancedApp.prototype = {
     _toggleResponsiveDesign: function()
     {
-        WebInspector.settings.responsiveDesignMode.set(!this._toggleResponsiveDesignButton.toggled);
+        WebInspector.settings.responsiveDesign.enabled.set(!this._toggleResponsiveDesignButton.toggled);
     },
 
-    _responsiveDesignModeChanged: function()
+    _responsiveDesignEnabledChanged: function()
     {
-        this._toggleResponsiveDesignButton.toggled = WebInspector.settings.responsiveDesignMode.get();
+        this._toggleResponsiveDesignButton.toggled = WebInspector.settings.responsiveDesign.enabled.get();
     },
 
     createRootView: function()