Revert of Mandoline: Remove native_viewport.mojom

components/view_manager/event_dispatcher.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 COMPONENTS_VIEW_MANAGER_EVENT_DISPATCHER_H_
 #define COMPONENTS_VIEW_MANAGER_EVENT_DISPATCHER_H_
 
 #include <set>
 
 #include "base/basictypes.h"
-#include "ui/mojo/events/input_event_constants.mojom.h"
-#include "ui/mojo/events/input_events.mojom.h"
-#include "ui/mojo/events/input_key_codes.mojom.h"
+#include "components/view_manager/public/interfaces/native_viewport.mojom.h"
 
 namespace view_manager {
 
 class ConnectionManager;
 
 // Handles dispatching events to the right location as well as updating focus.
-class EventDispatcher {
+class EventDispatcher : public mojo::NativeViewportEventDispatcher {
  public:
   explicit EventDispatcher(ConnectionManager* connection_manager);
-  ~EventDispatcher();
+  ~EventDispatcher() override;
 
   void AddAccelerator(mojo::KeyboardCode keyboard_code, mojo::EventFlags flags);
   void RemoveAccelerator(mojo::KeyboardCode keyboard_code,
                          mojo::EventFlags flags);
 
-  void OnEvent(mojo::EventPtr event);
+  // NativeViewportEventDispatcher:
+  void OnEvent(mojo::EventPtr event, const OnEventCallback& callback) override;
 
  private:
   struct Accelerator {
     Accelerator(mojo::KeyboardCode keyboard_code, mojo::EventFlags flags)
         : keyboard_code(keyboard_code), flags(flags) {}
 
     // So we can use this in a set.
     bool operator<(const Accelerator& other) const {
       if (keyboard_code == other.keyboard_code)
         return flags < other.flags;
       return keyboard_code < other.keyboard_code;
     }
 
     mojo::KeyboardCode keyboard_code;
     mojo::EventFlags flags;
   };
 
   ConnectionManager* connection_manager_;
 
   std::set<Accelerator> accelerators_;
 
   DISALLOW_COPY_AND_ASSIGN(EventDispatcher);
 };
 
 }  // namespace view_manager
 
 #endif  // COMPONENTS_VIEW_MANAGER_EVENT_DISPATCHER_H_