[Sync] Componentize synced_tab_delegate

chrome/browser/sync/glue/synced_tab_delegate.cc

-// Copyright 2013 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_tab_delegate.h"
-
-#include "base/logging.h"
-#include "chrome/browser/sync/glue/synced_session_util.h"
-#include "chrome/browser/ui/sync/tab_contents_synced_tab_delegate.h"
-#include "chrome/common/url_constants.h"
-#include "content/public/browser/navigation_entry.h"
-#include "url/gurl.h"
-
-using browser_sync::SyncedTabDelegate;
-
-namespace browser_sync {
-
-SyncedTabDelegate::SyncedTabDelegate() {}
-SyncedTabDelegate::~SyncedTabDelegate() {}
-
-content::NavigationEntry* SyncedTabDelegate::GetCurrentEntryMaybePending()
-    const {
-  return GetEntryAtIndexMaybePending(GetCurrentEntryIndex());
-}
-
-content::NavigationEntry* SyncedTabDelegate::GetEntryAtIndexMaybePending(
-    int i) const {
-  return (GetPendingEntryIndex() == i) ? GetPendingEntry() : GetEntryAtIndex(i);
-}
-
-bool SyncedTabDelegate::ShouldSync() const {
-  if (GetSyncedWindowDelegate() == nullptr)
-    return false;
-
-  // Is there a valid NavigationEntry?
-  if (ProfileIsSupervised() && GetBlockedNavigations()->size() > 0)
-    return true;
-
-  if (IsInitialBlankNavigation())
-    return false;  // This deliberately ignores a new pending entry.
-
-  int entry_count = GetEntryCount();
-  bool found_valid_url = false;
-  for (int i = 0; i < entry_count; ++i) {
-    const content::NavigationEntry* entry = GetEntryAtIndexMaybePending(i);
-    if (!entry) {
-      return false;
-    }
-    const GURL& virtual_url = entry->GetVirtualURL();
-
-    if (ShouldSyncURL(virtual_url)) {
-      found_valid_url = true;
-    } else if (virtual_url == GURL(chrome::kChromeUIHistoryURL)) {
-      // The history page is treated specially as we want it to trigger syncable
-      // events for UI purposes.
-      found_valid_url = true;
-    }
-  }
-  return found_valid_url;
-}
-
-void SyncedTabDelegate::SetSyncedWindowGetter(
-    scoped_ptr<SyncedWindowDelegatesGetter> getter) {
-  synced_window_getter_.reset(getter.release());
-}
-
-const SyncedWindowDelegate* SyncedTabDelegate::GetSyncedWindowDelegate() const {
-  if (!synced_window_getter_) {
-    NOTREACHED();
-  }
-  return synced_window_getter_->FindById(GetWindowId());
-}
-
-}  // namespace browser_sync