Implementation of device metrics emulation in render view.

content/renderer/external_popup_menu.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/renderer/external_popup_menu.h"
 
 #include "content/common/view_messages.h"
 #include "content/renderer/menu_item_builder.h"
 #include "content/renderer/render_view_impl.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
 #include "third_party/WebKit/public/web/WebExternalPopupMenuClient.h"
 
 namespace content {
 
 ExternalPopupMenu::ExternalPopupMenu(
     RenderViewImpl* render_view,
     const WebKit::WebPopupMenuInfo& popup_menu_info,
     WebKit::WebExternalPopupMenuClient* popup_menu_client)
     : render_view_(render_view),
       popup_menu_info_(popup_menu_info),
-      popup_menu_client_(popup_menu_client) {
+      popup_menu_client_(popup_menu_client),
+      origin_scale_for_emulation_(0) {
+}
+
+void ExternalPopupMenu::SetOriginScaleForEmulation(float scale) {
+  origin_scale_for_emulation_ = scale;
 }
 
 void ExternalPopupMenu::show(const WebKit::WebRect& bounds) {
+  WebKit::WebRect rect = bounds;
+  if (origin_scale_for_emulation_) {
+    rect.x *= origin_scale_for_emulation_;
+    rect.y *= origin_scale_for_emulation_;
+  }
+
   ViewHostMsg_ShowPopup_Params popup_params;
-  popup_params.bounds = bounds;
+  popup_params.bounds = rect;
   popup_params.item_height = popup_menu_info_.itemHeight;
   popup_params.item_font_size = popup_menu_info_.itemFontSize;
   popup_params.selected_item = popup_menu_info_.selectedIndex;
   for (size_t i = 0; i < popup_menu_info_.items.size(); ++i) {
     popup_params.popup_items.push_back(
         MenuItemBuilder::Build(popup_menu_info_.items[i]));
   }
   popup_params.right_aligned = popup_menu_info_.rightAligned;
   popup_params.allow_multiple_selection =
       popup_menu_info_.allowMultipleSelection;
@@ skipping 23 matching lines @@
   if (!popup_menu_client_)
     return;
   if (canceled)
     popup_menu_client_->didCancel();
   else
     popup_menu_client_->didAcceptIndices(indices);
 }
 #endif
 
 }  // namespace content