[Sync] Remove static methods on SyncedWindowDelegate.

chrome/browser/ui/sync/browser_synced_window_delegate.h

 // Copyright (c) 2012 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.
 
 #ifndef CHROME_BROWSER_UI_SYNC_BROWSER_SYNCED_WINDOW_DELEGATE_H_
 #define CHROME_BROWSER_UI_SYNC_BROWSER_SYNCED_WINDOW_DELEGATE_H_
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/sync/glue/synced_window_delegate.h"
 #include "components/sessions/session_id.h"
 
 class Browser;
 
 namespace browser_sync {
 class SyncedTabDelegate;
 }
 
 // A BrowserSyncedWindowDelegate is the Browser-based implementation of
 // SyncedWindowDelegate.
 class BrowserSyncedWindowDelegate : public browser_sync::SyncedWindowDelegate {
  public:
   explicit BrowserSyncedWindowDelegate(Browser* browser);
   ~BrowserSyncedWindowDelegate() override;
 
-  // Add all BrowserSyncedWindowDelegate instances to the output set.
-  static void GetAllHelper(
-      std::set<const browser_sync::SyncedWindowDelegate*>* delegates);
-
-  // Find the SyncedWindowDelegate for a particular browser window id. Note
-  // that this only considers Browser windows (AppWindow are not considered).
-  static const browser_sync::SyncedWindowDelegate* FindByIdHelper(
-      SessionID::id_type id);
-
   // SyncedWindowDelegate:
   bool HasWindow() const override;
   SessionID::id_type GetSessionId() const override;
   int GetTabCount() const override;
   int GetActiveIndex() const override;
   bool IsApp() const override;
   bool IsTypeTabbed() const override;
   bool IsTypePopup() const override;
   bool IsTabPinned(const browser_sync::SyncedTabDelegate* tab) const override;
   browser_sync::SyncedTabDelegate* GetTabAt(int index) const override;
   SessionID::id_type GetTabIdAt(int index) const override;
   bool IsSessionRestoreInProgress() const override;
   bool ShouldSync() const override;
 
  private:
   Browser* browser_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserSyncedWindowDelegate);
 };
 
 #endif  // CHROME_BROWSER_UI_SYNC_BROWSER_SYNCED_WINDOW_DELEGATE_H_