Upstream Chrome on iOS source code [9/11].

ios/chrome/browser/ui/tab_switcher/tab_switcher_panel_overlay_view.h

+// 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.
+
+#ifndef IOS_CHROME_BROWSER_UI_TAB_SWITCHER_TAB_SWITCHER_PANEL_OVERLAY_VIEW_H_
+#define IOS_CHROME_BROWSER_UI_TAB_SWITCHER_TAB_SWITCHER_PANEL_OVERLAY_VIEW_H_
+
+#import <UIKit/UIKit.h>
+
+namespace ios {
+class ChromeBrowserState;
+}
+
+enum class TabSwitcherPanelOverlayType {
+  OVERLAY_PANEL_EMPTY,
+  OVERLAY_PANEL_USER_SIGNED_OUT,
+  OVERLAY_PANEL_USER_SIGNED_IN_SYNC_OFF,
+  OVERLAY_PANEL_USER_SIGNED_IN_SYNC_ON_NO_SESSIONS,
+  OVERLAY_PANEL_USER_SIGNED_IN_SYNC_IN_PROGRESS,
+  OVERLAY_PANEL_USER_NO_OPEN_TABS,
+  OVERLAY_PANEL_USER_NO_INCOGNITO_TABS
+};
+
+enum class TabSwitcherSignInPanelsType;
+
+TabSwitcherPanelOverlayType PanelOverlayTypeFromSignInPanelsType(
+    TabSwitcherSignInPanelsType signInPanelType);
+
+@interface TabSwitcherPanelOverlayView : UIView
+
+@property(nonatomic, assign) TabSwitcherPanelOverlayType overlayType;
+
+- (instancetype)initWithFrame:(CGRect)frame
+                 browserState:(ios::ChromeBrowserState*)browserState;
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_TAB_SWITCHER_TAB_SWITCHER_PANEL_OVERLAY_VIEW_H_