[Sync] Componentize synced_tab_delegate

chrome/browser/sync/glue/synced_session_util.cc

-// Copyright 2015 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/sync/glue/synced_session_util.h"
-
-#include "chrome/common/url_constants.h"
-#include "components/sessions/core/session_types.h"
-#include "content/public/common/url_constants.h"
-
-namespace browser_sync {
-
-// Note: chrome:// and file:// are not considered valid urls (for syncing).
-bool ShouldSyncURL(const GURL& url) {
-  return url.is_valid() && !url.SchemeIs(content::kChromeUIScheme) &&
-         !url.SchemeIs(chrome::kChromeNativeScheme) && !url.SchemeIsFile();
-}
-
-bool ShouldSyncSessionTab(const sessions::SessionTab& tab) {
-  for (auto&& navigation : tab.navigations) {
-    if (ShouldSyncURL(navigation.virtual_url())) {
-      return true;
-    }
-  }
-  return false;
-}
-
-bool ShouldSyncSessionWindow(const sessions::SessionWindow& window) {
-  for (auto* tab : window.tabs) {
-    if (ShouldSyncSessionTab(*tab)) {
-      return true;
-    }
-  }
-  return false;
-}
-
-}  // namespace browser_sync