Create Desktop to iOS Promotion skeleton.

chrome/browser/ui/desktop_ios_promotion/desktop_ios_promotion_controller.h

+// 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 CHROME_BROWSER_UI_DESKTOP_IOS_PROMOTION_DESKTOP_IOS_PROMOTION_CONTROLLER_H_
+#define CHROME_BROWSER_UI_DESKTOP_IOS_PROMOTION_DESKTOP_IOS_PROMOTION_CONTROLLER_H_
+
+#include "base/macros.h"
+
+namespace desktop_ios_promotion {
+enum class PromotionEntryPoint;
+}
+
+// This class provides data to the Desktop to mobile promotion and control the
+// promotion actions.
+class DesktopIOSPromotionController {
+ public:
+  // Should be instantiated on the UI thread.
+  DesktopIOSPromotionController();
+  ~DesktopIOSPromotionController();
+
+  // Called by the view code when "Send SMS" button is clicked by the user.
+  void OnSendSMSClicked();
+
+  // Called by the view code when "No Thanks" button is clicked by the user.
+  void OnNoThanksClicked();
+
+  // (TODO): If needed verify that functions that affect the UI are done
+  // on the same thread.
+
+  DISALLOW_COPY_AND_ASSIGN(DesktopIOSPromotionController);
+};
+
+#endif  // CHROME_BROWSER_UI_DESKTOP_IOS_PROMOTION_DESKTOP_IOS_PROMOTION_CONTROLLER_H_