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

content/renderer/render_widget.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_RENDERER_RENDER_WIDGET_H_
 #define CONTENT_RENDERER_RENDER_WIDGET_H_
 
 #include <deque>
 #include <map>
 
@@ skipping 256 matching lines @@
   void UpdateTextInputState(ShowIme show_ime, ChangeSource change_source);
 #endif
 
 #if defined(OS_MACOSX) || defined(USE_AURA)
   // Checks if the composition range or composition character bounds have been
   // changed. If they are changed, the new value will be sent to the browser
   // process.
   void UpdateCompositionInfo(bool should_update_range);
 #endif
 
-#if defined(OS_MACOSX)
-  void DidChangeScrollbarsForMainFrame(bool has_horizontal_scrollbar,
-                                       bool has_vertical_scrollbar);
-#endif  // defined(OS_MACOSX)
-
 #if defined(OS_ANDROID)
   void DidChangeBodyBackgroundColor(SkColor bg_color);
 #endif
 
  protected:
   // Friend RefCounted so that the dtor can be non-public. Using this class
   // without ref-counting is an error.
   friend class base::RefCounted<RenderWidget>;
   // For unit tests.
   friend class RenderWidgetTest;
@@ skipping 396 matching lines @@
   // browser regarding IME-type events that have not been acknowledged by the
   // browser. If this value is not 0 IME events will be dropped.
   int outstanding_ime_acks_;
 
   // The background color of the document body element. This is used as the
   // default background color for filling the screen areas for which we don't
   // have the actual content.
   SkColor body_background_color_;
 #endif
 
-#if defined(OS_MACOSX)
-  // These store the "has scrollbars" state last sent to the browser.
-  bool cached_has_main_frame_horizontal_scrollbar_;
-  bool cached_has_main_frame_vertical_scrollbar_;
-#endif  // defined(OS_MACOSX)
-
   scoped_ptr<ScreenMetricsEmulator> screen_metrics_emulator_;
 
   // Popups may be displaced when screen metrics emulation is enabled.
   // These values are used to properly adjust popup position.
   gfx::Point popup_view_origin_for_emulation_;
   gfx::Point popup_screen_origin_for_emulation_;
   float popup_origin_scale_for_emulation_;
 
   scoped_ptr<ResizingModeSelector> resizing_mode_selector_;
 
@@ skipping 11 matching lines @@
 
   ui::MenuSourceType context_menu_source_type_;
   gfx::Point touch_editing_context_menu_location_;
 
   DISALLOW_COPY_AND_ASSIGN(RenderWidget);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_RENDER_WIDGET_H_