Scroll offset pinning and content size notifications were only used for the Mac overlay navigation …

content/browser/renderer_host/render_view_host_impl.h

 // Copyright (c) 2012 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_VIEW_HOST_IMPL_H_
 #define CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 474 matching lines @@
   void OnRenderViewReady();
   void OnRenderProcessGone(int status, int error_code);
   void OnUpdateState(int32 page_id, const PageState& state);
   void OnUpdateTargetURL(int32 page_id, const GURL& url);
   void OnClose();
   void OnRequestMove(const gfx::Rect& pos);
   void OnDocumentAvailableInMainFrame(bool uses_temporary_zoom_level);
   void OnToggleFullscreen(bool enter_fullscreen);
   void OnDidContentsPreferredSizeChange(const gfx::Size& new_size);
   void OnDidChangeScrollOffset();
-  void OnDidChangeScrollOffsetPinningForMainFrame(bool is_pinned_to_left,
-                                                  bool is_pinned_to_right);
   void OnPasteFromSelectionClipboard();
   void OnRouteCloseEvent();
   void OnRouteMessageEvent(const ViewMsg_PostMessage_Params& params);
   void OnStartDragging(const DropData& drop_data,
                        blink::WebDragOperationsMask operations_allowed,
                        const SkBitmap& bitmap,
                        const gfx::Vector2d& bitmap_offset_in_dip,
                        const DragEventSourceInfo& event_info);
   void OnUpdateDragCursor(blink::WebDragOperation drag_operation);
   void OnTargetDropACK();
@@ skipping 138 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(RenderViewHostImpl);
 };
 
 #if defined(COMPILER_MSVC)
 #pragma warning(pop)
 #endif
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_RENDER_VIEW_HOST_IMPL_H_