[ios clean] Add placeholder for NTP bookmarks, chrome home and open tabs.

ios/clean/chrome/browser/ui/ntp/ntp_home_mediator.h

Index: ios/clean/chrome/browser/ui/ntp/ntp_home_mediator.h
diff --git a/ios/clean/chrome/browser/ui/ntp/ntp_home_mediator.h b/ios/clean/chrome/browser/ui/ntp/ntp_home_mediator.h
new file mode 100644
index 0000000000000000000000000000000000000000..e8688d6b583b60f6f7e3af9f711377668b1ac72c
--- /dev/null
+++ b/ios/clean/chrome/browser/ui/ntp/ntp_home_mediator.h
@@ -0,0 +1,24 @@
+// Copyright 2017 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_CLEAN_CHROME_BROWSER_UI_NTP_NTP_HOME_MEDIATOR_H_
+#define IOS_CLEAN_CHROME_BROWSER_UI_NTP_NTP_HOME_MEDIATOR_H_
+
+#import <UIKit/UIKit.h>
+
+#import "ios/chrome/browser/ui/toolbar/web_toolbar_controller.h"
+#import "ios/chrome/browser/ui/url_loader.h"
+
+@protocol TabCommands;
+
+// A mediator object that sets an NTP home view controller's appeareance based
+// on various data sources.
+@interface NTPHomeMediator : NSObject<UrlLoader, OmniboxFocuser>
+
+// The dispatcher for this mediator.
+@property(nonatomic, weak) id<TabCommands> dispatcher;
+
+@end
+
+#endif  // IOS_CLEAN_CHROME_BROWSER_UI_NTP_NTP_HOME_MEDIATOR_H_