Queue postMessage messages destined for a MimeHandlerView guest

extensions/renderer/guest_view/mime_handler_view/mime_handler_view_container.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_RENDERER_GUEST_VIEW_MIME_HANDLER_VIEW_CONTAINER_H_
 #define EXTENSIONS_RENDERER_GUEST_VIEW_MIME_HANDLER_VIEW_CONTAINER_H_
 
+#include "base/memory/linked_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "extensions/renderer/guest_view/guest_view_container.h"
 #include "extensions/renderer/scoped_persistent.h"
 #include "third_party/WebKit/public/platform/WebURLLoader.h"
 #include "third_party/WebKit/public/platform/WebURLLoaderClient.h"
 #include "url/gurl.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
 
@@ skipping 40 matching lines @@
                         double finish_time,
                         int64_t total_encoded_data_length) override;
 
   // Post a JavaScript message to the guest.
   void PostMessage(v8::Isolate* isolate,
                    v8::Handle<v8::Value> message);
 
  private:
   // Message handlers.
   void OnCreateMimeHandlerViewGuestACK(int element_instance_id);
+  void OnMimeHandlerViewGuestOnLoadCompleted(int element_instance_id);
   void OnGuestAttached(int element_instance_id,
                        int guest_proxy_routing_id);
 
   void CreateMimeHandlerViewGuest();
 
   // The MIME type of the plugin.
   const std::string mime_type_;
 
   // The URL of the extension to navigate to.
   std::string html_string_;
 
   // Whether the plugin is embedded or not.
   bool is_embedded_;
 
   // The original URL of the plugin.
   GURL original_url_;
 
   // Save the RenderView RoutingID of the guest here so it can be used to route
   // PostMessage calls.
   int guest_proxy_routing_id_;
 
   // A URL loader to load the |original_url_| when the plugin is embedded. In
   // the embedded case, no URL request is made automatically.
   scoped_ptr<blink::WebURLLoader> loader_;
 
   // The scriptable object that backs the plugin.
   ScopedPersistent<v8::Object> scriptable_object_;
 
+  // Pending postMessage messages that need to be sent to the guest. These are
+  // queued while the guest is loading and once it is fully loaded they are
+  // delivered so that messages aren't lost.
+  std::vector<linked_ptr<ScopedPersistent<v8::Value>>> pending_messages_;
+
+  // True if the guest page has fully loaded and its JavaScript onload function
+  // has been called.
+  bool guest_loaded_;
+
   base::WeakPtrFactory<MimeHandlerViewContainer> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(MimeHandlerViewContainer);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_GUEST_VIEW_MIME_HANDLER_VIEW_CONTAINER_H_