[Sync] Remove static methods on SyncedWindowDelegate.

chrome/browser/ui/sync/browser_synced_window_delegate.h

Index: chrome/browser/ui/sync/browser_synced_window_delegate.h
diff --git a/chrome/browser/ui/sync/browser_synced_window_delegate.h b/chrome/browser/ui/sync/browser_synced_window_delegate.h
index 76772e12316d5ab896e3d553303fadc867a32740..2d266ba06b928d1050b2c5f1f83badefc2b33f35 100644
--- a/chrome/browser/ui/sync/browser_synced_window_delegate.h
+++ b/chrome/browser/ui/sync/browser_synced_window_delegate.h
@@ -22,15 +22,6 @@ class BrowserSyncedWindowDelegate : public browser_sync::SyncedWindowDelegate {
   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;