Queue postMessage messages destined for a MimeHandlerView guest

extensions/browser/guest_view/guest_view_base.h

 // Copyright 2014 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.
 
 #ifndef EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_
 #define EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_
 
 #include <queue>
 
 #include "base/memory/weak_ptr.h"
@@ skipping 193 matching lines @@
   bool attached() const {
     return element_instance_id_ != guestview::kInstanceIDNone;
   }
 
   // Returns the instance ID of the <*view> element.
   int view_instance_id() const { return view_instance_id_; }
 
   // Returns the instance ID of this GuestViewBase.
   int guest_instance_id() const { return guest_instance_id_; }
 
+  // Returns the instance ID of the GuestViewBase's element.
+  int element_instance_id() const { return element_instance_id_; }
+
   // Returns the extension ID of the embedder.
   const std::string& owner_extension_id() const {
     return owner_extension_id_;
   }
 
   // Returns whether this GuestView is embedded in an extension/app.
   bool in_extension() const { return !owner_extension_id_.empty(); }
 
   // Returns the user browser context of the embedder.
   content::BrowserContext* browser_context() const { return browser_context_; }
@@ skipping 144 matching lines @@
   // This is used to ensure pending tasks will not fire after this object is
   // destroyed.
   base::WeakPtrFactory<GuestViewBase> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(GuestViewBase);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_GUEST_VIEW_GUEST_VIEW_BASE_H_