Implement touch events for site-isolation.

content/browser/renderer_host/render_widget_host_input_event_router.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 CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_INPUT_EVENT_ROUTER_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_INPUT_EVENT_ROUTER_H_
 
 #include <stdint.h>
 #include <unordered_map>
 
 #include "base/containers/hash_tables.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "cc/surfaces/surface_hittest_delegate.h"
 #include "cc/surfaces/surface_id.h"
 #include "content/common/content_export.h"
+#include "ui/gfx/geometry/vector2d.h"
 
 struct FrameHostMsg_HittestData_Params;
 
 namespace blink {
 class WebMouseEvent;
 class WebMouseWheelEvent;
 class WebTouchEvent;
 }
 
 namespace gfx {
@@ skipping 58 matching lines @@
   using WeakTarget = base::WeakPtr<RenderWidgetHostViewBase>;
   using SurfaceIdNamespaceOwnerMap =
       base::hash_map<uint32_t, base::WeakPtr<RenderWidgetHostViewBase>>;
 
   RenderWidgetHostViewBase* FindEventTarget(RenderWidgetHostViewBase* root_view,
                                             const gfx::Point& point,
                                             gfx::Point* transformed_point);
 
   SurfaceIdNamespaceOwnerMap owner_map_;
   WeakTarget current_touch_target_;
+  gfx::Vector2d touch_delta_;
   int active_touches_;
   std::unordered_map<cc::SurfaceId, HittestData, cc::SurfaceIdHash>
       hittest_data_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostInputEventRouter);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_WIDGET_HOST_INPUT_EVENT_ROUTER_H_