Move html_viewer from mojo/services to components.

mojo/services/html_viewer/touch_handler.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 MOJO_SERVICES_HTML_VIEWER_TOUCH_HANDLER_H_
-#define MOJO_SERVICES_HTML_VIEWER_TOUCH_HANDLER_H_
-
-#include "base/basictypes.h"
-#include "ui/events/gesture_detection/filtered_gesture_provider.h"
-
-namespace blink {
-class WebView;
-}
-
-namespace mojo {
-class Event;
-}
-
-namespace ui {
-class MotionEventGeneric;
-}
-
-namespace html_viewer {
-
-// TouchHandler is responsible for converting touch events into gesture events.
-// It does this by converting mojo::Events into a MotionEventGeneric and using
-// FilteredGestureProvider.
-class TouchHandler : public ui::GestureProviderClient {
- public:
-  explicit TouchHandler(blink::WebView* web_view);
-  ~TouchHandler() override;
-
-  void OnTouchEvent(const mojo::Event& event);
-
-  // ui::GestureProviderClient implementation.
-  void OnGestureEvent(const ui::GestureEventData& gesture) override;
-
- private:
-  // Updates |current_motion_event_| from |event|. Returns true on success.
-  bool UpdateMotionEvent(const mojo::Event& event);
-
-  // Sends |current_motion_event_| to the GestureProvider and WebView.
-  void SendMotionEventToGestureProvider();
-
-  // Does post processing after sending |current_motion_event_| to the
-  // GestureProvider.
-  void PostProcessMotionEvent(const mojo::Event& event);
-
-  blink::WebView* web_view_;
-
-  ui::FilteredGestureProvider gesture_provider_;
-
-  // As touch events are received they are converted to this event. If null no
-  // touch events are in progress.
-  scoped_ptr<ui::MotionEventGeneric> current_motion_event_;
-
-  DISALLOW_COPY_AND_ASSIGN(TouchHandler);
-};
-
-}  // namespace html_viewer
-
-#endif  // MOJO_SERVICES_HTML_VIEWER_TOUCH_HANDLER_H_