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diff --git a/components/html_viewer/touch_handler.h b/components/html_viewer/touch_handler.h
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+// 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_HTML_VIEWER_TOUCH_HANDLER_H_
+#define COMPONENTS_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  // COMPONENTS_HTML_VIEWER_TOUCH_HANDLER_H_