Set extension-related webkit preferences in a common location.

chrome/browser/extensions/extension_webkit_preferences.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "webkit/glue/webpreferences.h"
+
+#include "chrome/common/extensions/extension.h"
+
+namespace extension_webkit_preferences {
+
+void SetPreferences(WebPreferences* webkit_prefs, const Extension* extension) {
+  if (extension && !extension->is_hosted_app()) {
+    // Extensions are trusted so we override any user preferences for disabling
+    // javascript or images.
+    webkit_prefs->loads_images_automatically = true;
+    webkit_prefs->javascript_enabled = true;
+
+    // Tabs aren't typically allowed to close windows. But extensions shouldn't
+    // be subject to that.
+    webkit_prefs->allow_scripts_to_close_windows = true;
+
+    // Enable privileged WebGL extensions.
+    webkit_prefs->privileged_webgl_extensions_enabled = true;
+  }
+}
+
+}  // extension_webkit_preferences