Track pending WebContents and widgets by (process_id, routing_id) pair.

content/browser/browser_plugin/browser_plugin_guest.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/browser_plugin/browser_plugin_guest.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 
@@ skipping 957 matching lines @@
                                   params.item_font_size,
                                   params.selected_item,
                                   params.popup_items,
                                   params.right_aligned,
                                   params.allow_multiple_selection);
 }
 #endif
 
 void BrowserPluginGuest::OnShowWidget(int route_id,
                                       const gfx::Rect& initial_rect) {
-  GetWebContents()->ShowCreatedWidget(route_id, initial_rect);
+  int process_id = GetWebContents()->GetRenderProcessHost()->GetID();
+  GetWebContents()->ShowCreatedWidget(process_id, route_id, initial_rect);
 }
 
 void BrowserPluginGuest::OnTakeFocus(bool reverse) {
   SendMessageToEmbedder(
       new BrowserPluginMsg_AdvanceFocus(browser_plugin_instance_id(), reverse));
 }
 
 void BrowserPluginGuest::OnTextInputStateChanged(const TextInputState& params) {
   // Save the state of text input so we can restore it on focus.
   last_text_input_state_.reset(new TextInputState(params));
@@ skipping 17 matching lines @@
           range, character_bounds);
 }
 #endif
 
 void BrowserPluginGuest::SetContextMenuPosition(const gfx::Point& position) {
   if (delegate_)
     delegate_->SetContextMenuPosition(position);
 }
 
 }  // namespace content