Split incognito extension content settings in session-only and persistent.

chrome/browser/content_settings/content_settings_details.cc

Index: chrome/browser/content_settings/content_settings_details.cc
diff --git a/chrome/browser/content_settings/content_settings_details.cc b/chrome/browser/content_settings/content_settings_details.cc
new file mode 100644
index 0000000000000000000000000000000000000000..20a5ff38577bd2695a38631b3e6181bdc20de489
--- /dev/null
+++ b/chrome/browser/content_settings/content_settings_details.cc
@@ -0,0 +1,15 @@
+// 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 "chrome/browser/content_settings/content_settings_details.h"
+
+ContentSettingsDetails::ContentSettingsDetails(
+    const ContentSettingsPattern& pattern,
+    ContentSettingsType type,
+    const std::string& resource_identifier)
+    : pattern_(pattern),
+      type_(type),
+      resource_identifier_(resource_identifier) {
+}
+