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

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

Index: ios/clean/chrome/browser/ui/ntp/new_tab_page_home_coordinator.h
diff --git a/ios/clean/chrome/browser/ui/ntp/new_tab_page_home_coordinator.h b/ios/clean/chrome/browser/ui/ntp/new_tab_page_home_coordinator.h
new file mode 100644
index 0000000000000000000000000000000000000000..caf181c553cc9cbdcbfca0d7a82e0776a977e8ae
--- /dev/null
+++ b/ios/clean/chrome/browser/ui/ntp/new_tab_page_home_coordinator.h
@@ -0,0 +1,23 @@
+// 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_NEW_TAB_PAGE_HOME_COORDINATOR_H_
+#define IOS_CLEAN_CHROME_BROWSER_UI_NTP_NEW_TAB_PAGE_HOME_COORDINATOR_H_
+
+#import <UIKit/UIKit.h>
+#import "ios/shared/chrome/browser/ui/coordinators/browser_coordinator.h"
+
+namespace web {
+class WebState;
+}
+
+@interface NTPHomeCoordinator : BrowserCoordinator
+
+// The WebState representing the web page that will be displayed in this page.
+// Calling code should assign this before starting this coordinator.
+@property(nonatomic, assign) web::WebState* webState;
+
+@end
+
+#endif  // IOS_CLEAN_CHROME_BROWSER_UI_NTP_NEW_TAB_PAGE_HOME_COORDINATOR_H_