[DevTools] Cleanup Page domain calls, which should be Emulation calls.

Source/devtools/front_end/main/RenderingOptions.js

Index: Source/devtools/front_end/main/RenderingOptions.js
diff --git a/Source/devtools/front_end/main/RenderingOptions.js b/Source/devtools/front_end/main/RenderingOptions.js
index 63dfd1a18bad8ec21079737002f0d09beaa87b06..e7da89fb5d6669dd273d3c9e7f3e0239e688c0c2 100644
--- a/Source/devtools/front_end/main/RenderingOptions.js
+++ b/Source/devtools/front_end/main/RenderingOptions.js
@@ -49,11 +49,23 @@ WebInspector.RenderingOptions = function()
 
 WebInspector.RenderingOptions.prototype = {
     /**
+     * @param {!WebInspector.Target} target
+     * @return {boolean}
+     */
+    supportsRendering: function(target)
+    {
+        return target.isPage();
+    },
+
+    /**
      * @override
      * @param {!WebInspector.Target} target
      */
     targetAdded: function(target)
     {
+        if (this.supportsRendering(target))
+            return;
+
         var settings = this._setterNames.keysArray();
         for (var i = 0; i < settings.length; ++i) {
             var setting = settings[i];
@@ -79,13 +91,18 @@ WebInspector.RenderingOptions.prototype = {
     _mapSettingToSetter: function(setting, setterName)
     {
         this._setterNames.set(setting, setterName);
-        setting.addChangeListener(changeListener);
+        setting.addChangeListener(changeListener.bind(this));
 
+        /**
+         * @this {WebInspector.RenderingOptions}
+         */
         function changeListener()
         {
             var targets = WebInspector.targetManager.targets();
-            for (var i = 0; i < targets.length; ++i)
-                targets[i].renderingAgent()[setterName](setting.get());
+            for (var i = 0; i < targets.length; ++i) {
+                if (this.supportsRendering(targets[i]))
+                    targets[i].renderingAgent()[setterName](setting.get());
+            }
         }
     }
 }