[Sync] Remove static methods on SyncedWindowDelegate.

chrome/browser/sync/glue/synced_tab_delegate_desktop.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_tab_delegate.h"
+#include "chrome/browser/ui/sync/browser_synced_window_delegates_getter.h"
 #include "chrome/browser/ui/sync/tab_contents_synced_tab_delegate.h"
 
 // This should be the version of ImplFromWebContents that's pulled in for non-
 // android/ios builds. This is the standard content::WebContentsUserData way.
 // SyncedTabDelegateAndroid is a little bit funky, and does this differently.
 // Since SyncedTabDelegateAndroid implements most of its functionality by
 // invoking TabContentsSyncedTabDelegate, this is the only SyncedTabDelegate
 // piece that avoids being included in android builds.
 
 namespace browser_sync {
 
 // static
 SyncedTabDelegate* SyncedTabDelegate::ImplFromWebContents(
     content::WebContents* web_contents) {
-  return TabContentsSyncedTabDelegate::FromWebContents(web_contents);
+  SyncedTabDelegate* delegate =
+      TabContentsSyncedTabDelegate::FromWebContents(web_contents);
+  if (!delegate) {
+    return nullptr;
+  }
+  delegate->SetSyncedWindowGetter(make_scoped_ptr(
+      new BrowserSyncedWindowDelegatesGetter()));
+  return delegate;
 }
 
 } // namespace browser_sync