Upstream Chrome on iOS source code [2/11].

ios/chrome/browser/tabs/tab_model_synced_window_delegate.h

Index: ios/chrome/browser/tabs/tab_model_synced_window_delegate.h
diff --git a/ios/chrome/browser/tabs/tab_model_synced_window_delegate.h b/ios/chrome/browser/tabs/tab_model_synced_window_delegate.h
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+++ b/ios/chrome/browser/tabs/tab_model_synced_window_delegate.h
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+// Copyright 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 IOS_CHROME_BROWSER_TABS_TAB_MODEL_SYNCED_WINDOW_DELEGATE_H_
+#define IOS_CHROME_BROWSER_TABS_TAB_MODEL_SYNCED_WINDOW_DELEGATE_H_
+
+#include "base/macros.h"
+#include "components/sessions/core/session_id.h"
+#include "components/sync_sessions/synced_window_delegate.h"
+
+@class TabModel;
+
+namespace browser_sync {
+class SyncedTabDelegate;
+}
+
+// A TabModelSyncedWindowDelegate is the iOS-based implementation of
+// SyncedWindowDelegate.
+class TabModelSyncedWindowDelegate
+    : public sync_sessions::SyncedWindowDelegate {
+ public:
+  explicit TabModelSyncedWindowDelegate(TabModel* tab_model);
+  ~TabModelSyncedWindowDelegate() override;
+
+  // 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 sync_sessions::SyncedTabDelegate* tab) const override;
+  sync_sessions::SyncedTabDelegate* GetTabAt(int index) const override;
+  // Return the tab id for the tab at |index|.
+  SessionID::id_type GetTabIdAt(int index) const override;
+  bool IsSessionRestoreInProgress() const override;
+  bool ShouldSync() const override;
+
+ private:
+  TabModel* tab_model_;  // weak, owns us.
+
+  DISALLOW_COPY_AND_ASSIGN(TabModelSyncedWindowDelegate);
+};
+
+#endif  // IOS_CHROME_BROWSER_TABS_TAB_MODEL_SYNCED_WINDOW_DELEGATE_H_