Missing plugin : Fix null mimetype issue in embed tag

chrome/renderer/chrome_content_renderer_client.cc

 // Copyright (c) 2011 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 "chrome/renderer/chrome_content_renderer_client.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/logging.h"
@@ skipping 335 matching lines @@
   for (size_t i = 0; i < plugin.mime_types.size(); ++i) {
     if (plugin.mime_types[i].mime_type == actual_mime_type) {
       AppendParams(plugin.mime_types[i].additional_param_names,
                    plugin.mime_types[i].additional_param_values,
                    &params.attributeNames,
                    &params.attributeValues);
       break;
     }
   }
 
+  if (params.mimeType.isNull() && (actual_mime_type.size() > 0)) {
+    // Webkit might say that mime type is null while we already know the
+    // actual mime type via ChromeViewHostMsg_GetPluginInfo. In that case
+    // we should use what we know since WebpluginDelegateProxy does some
+    // specific initializations based on this information.
+    params.mimeType = WebString::fromUTF8(actual_mime_type.c_str());
+  }
+
   if (status.value ==
       ChromeViewHostMsg_GetPluginInfo_Status::kOutdatedBlocked) {
     render_view->Send(new ChromeViewHostMsg_BlockedOutdatedPlugin(
         render_view->GetRoutingId(), group->GetGroupName(),
         GURL(group->GetUpdateURL())));
   }
   if (status.value ==
           ChromeViewHostMsg_GetPluginInfo_Status::kOutdatedBlocked ||
       status.value ==
           ChromeViewHostMsg_GetPluginInfo_Status::kOutdatedDisallowed) {
@@ skipping 444 matching lines @@
     webkit::ppapi::PpapiInterfaceFactoryManager* factory_manager) {
   factory_manager->RegisterFactory(ChromePPAPIInterfaceFactory);
 }
 
 bool ChromeContentRendererClient::AllowSocketAPI(const GURL& url) {
   return allowed_socket_origins_.find(url.host()) !=
       allowed_socket_origins_.end();
 }
 
 }  // namespace chrome