Show icons for custom menuitems in contextmenu.

components/renderer_context_menu/render_view_context_menu_base.h

Index: components/renderer_context_menu/render_view_context_menu_base.h
diff --git a/components/renderer_context_menu/render_view_context_menu_base.h b/components/renderer_context_menu/render_view_context_menu_base.h
index 779e8bbd9297aa178665649f6a32371860e6573d..59258f536ec5cf5fca7b4d69eea29e9f830769b4 100644
--- a/components/renderer_context_menu/render_view_context_menu_base.h
+++ b/components/renderer_context_menu/render_view_context_menu_base.h
@@ -51,6 +51,8 @@ class RenderViewContextMenuBase : public ui::SimpleMenuModel::Delegate,
                                 bool enabled,
                                 bool hidden,
                                 const base::string16& title) = 0;
+    // Sets icon to the actual menu items controlled by the toolkit.
+    virtual void SetIcon(int command_id, const gfx::ImageSkia& icon) = 0;
   };
 
   static const size_t kMaxSelectionTextLength;
@@ -104,6 +106,7 @@ class RenderViewContextMenuBase : public ui::SimpleMenuModel::Delegate,
                       bool enabled,
                       bool hidden,
                       const base::string16& title) override;
+  void SetIcon(int command_id, const gfx::ImageSkia& icon) override;
   content::RenderViewHost* GetRenderViewHost() const override;
   content::WebContents* GetWebContents() const override;
   content::BrowserContext* GetBrowserContext() const override;