Multi-select <select> in 'external popup window'

content/browser/web_contents/web_contents_view_aura.cc

 // 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.
 
 #include "content/browser/web_contents/web_contents_view_aura.h"
 
 #include "base/utf_string_conversions.h"
 #include "content/browser/renderer_host/render_view_host_factory.h"
 #include "content/browser/web_contents/interstitial_page_impl.h"
 #include "content/browser/web_contents/web_contents_impl.h"
@@ skipping 384 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // WebContentsViewAura, RenderViewHostDelegateView implementation:
 
 void WebContentsViewAura::ShowContextMenu(
     const content::ContextMenuParams& params) {
   if (delegate_.get())
     delegate_->ShowContextMenu(params);
 }
 
+void WebContentsViewAura::ShowPopupMenu(const gfx::Rect& bounds,
+                                        int item_height,
+                                        double item_font_size,
+                                        int selected_item,
+                                        const std::vector<WebMenuItem>& items,
+                                        bool right_aligned,
+                                        bool allow_multiple_selection) {
+  // External popup menus are only used on Mac and Android.
+  NOTIMPLEMENTED();
+}
+
 void WebContentsViewAura::StartDragging(
     const WebDropData& drop_data,
     WebKit::WebDragOperationsMask operations,
     const SkBitmap& image,
     const gfx::Point& image_offset) {
   aura::RootWindow* root_window = GetNativeView()->GetRootWindow();
   if (!aura::client::GetDragDropClient(root_window))
     return;
 
   ui::OSExchangeDataProviderAura* provider = new ui::OSExchangeDataProviderAura;
@@ skipping 187 matching lines @@
     OnDragEntered(event);
 
   web_contents_->GetRenderViewHost()->DragTargetDrop(
       event.location(),
       GetNativeView()->GetRootWindow()->last_mouse_location(),
       ConvertAuraEventFlagsToWebInputEventModifiers(event.flags()));
   if (drag_dest_delegate_)
     drag_dest_delegate_->OnDrop();
   return current_drag_op_;
 }