Refactoring of SessionService to get componentized.

chrome/browser/sessions/session_service_utils.cc

+// Copyright 2014 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/sessions/session_service_utils.h"
+
+SessionWindow::WindowType WindowTypeForBrowserType(Browser::Type type) {
+  switch (type) {
+    case Browser::TYPE_POPUP:
+      return SessionWindow::TYPE_POPUP;
+    case Browser::TYPE_TABBED:
+      return SessionWindow::TYPE_TABBED;
+  }
+  NOTREACHED();
+}
+
+Browser::Type BrowserTypeForWindowType(SessionWindow::WindowType type) {
+  switch (type) {
+    case SessionWindow::TYPE_POPUP:
+      return Browser::TYPE_POPUP;
+    case SessionWindow::TYPE_TABBED:
+      return Browser::TYPE_TABBED;
+  }
+}