Remove Downcasting RVContextMenuBase in ContextMenuDeleagate implementations.

chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.h

Index: chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.h
diff --git a/chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.h b/chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.h
index 3c8a906eeb7eec14a68b44b7b6e13670d72a53d5..a8cf957bd98936559ff279c74fdbc2d297ae9d98 100644
--- a/chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.h
+++ b/chrome/browser/ui/views/renderer_context_menu/render_view_context_menu_views.h
@@ -8,6 +8,10 @@
 #include "chrome/browser/renderer_context_menu/render_view_context_menu.h"
 #include "ui/base/ui_base_types.h"
 
+namespace aura {
+class Window;
+}
+
 namespace gfx {
 class Point;
 }
@@ -31,11 +35,15 @@ class RenderViewContextMenuViews : public RenderViewContextMenu {
 
   virtual void ExecuteCommand(int command_id, int event_flags) override;
 
+  // RenderViewContextMenuBase implementation.
+  virtual void Show() override;
+
  protected:
   RenderViewContextMenuViews(content::RenderFrameHost* render_frame_host,
                              const content::ContextMenuParams& params);
 
-  // RenderViewContextMenu implementation.
+  // RenderViewContextMenuBase implementation.
+  virtual void CalculateScreenCoordinatesInParams() override;
   virtual bool GetAcceleratorForCommandId(
       int command_id,
       ui::Accelerator* accelerator) override;
@@ -45,6 +53,9 @@ class RenderViewContextMenuViews : public RenderViewContextMenu {
   virtual bool IsCommandIdChecked(int command_id) const override;
   virtual bool IsCommandIdEnabled(int command_id) const override;
 
+  aura::Window* GetActiveNativeView();
+  views::Widget* GetTopLevelWidget();
+
   // Model for the BiDi input submenu.
   ui::SimpleMenuModel bidi_submenu_model_;
   DISALLOW_COPY_AND_ASSIGN(RenderViewContextMenuViews);