Intersection Observer support for OOPIF

content/browser/frame_host/render_widget_host_view_child_frame.h

 // Copyright 2014 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_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_CHILD_FRAME_H_
 #define CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_CHILD_FRAME_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 176 matching lines @@
   float current_surface_scale_factor() { return current_surface_scale_factor_; }
 
   // Returns the view into which this view is directly embedded. This can
   // return nullptr when this view's associated child frame is not connected
   // to the frame tree.
   RenderWidgetHostViewBase* GetParentView();
 
   void RegisterFrameSinkId();
   void UnregisterFrameSinkId();
 
+  void UpdateViewportIntersection(const gfx::Rect& viewport_intersection,
+                                  const gfx::Point& root_offset);
+
  protected:
   friend class RenderWidgetHostView;
   friend class RenderWidgetHostViewChildFrameTest;
   friend class RenderWidgetHostViewGuestSurfaceTest;
 
   explicit RenderWidgetHostViewChildFrame(RenderWidgetHost* widget);
   void Init();
 
   // Clears current compositor surface, if one is in use.
   void ClearCompositorSurfaceIfNecessary();
@@ skipping 47 matching lines @@
   // The surface client ID of the parent RenderWidgetHostView.  0 if none.
   cc::FrameSinkId parent_frame_sink_id_;
 
   base::WeakPtrFactory<RenderWidgetHostViewChildFrame> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostViewChildFrame);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_FRAME_HOST_RENDER_WIDGET_HOST_VIEW_CHILD_FRAME_H_