When clearing plugin data at shutdown, wait for it to finish.

chrome/browser/plugin_service.cc

 // Copyright (c) 2010 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/browser/plugin_service.h"
 
 #include <vector>
 
 #include "base/command_line.h"
 #include "base/path_service.h"
@@ skipping 248 matching lines @@
           this, &PluginService::FinishOpenChannelToPlugin,
           plugin_path, client));
 }
 
 void PluginService::FinishOpenChannelToPlugin(
     const FilePath& plugin_path,
     PluginProcessHost::Client* client) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
 
   PluginProcessHost* plugin_host = FindOrStartPluginProcess(plugin_path);
-  if (plugin_host)
+  if (plugin_host) {
+    client->OnPluginProcessFound(plugin_host);
     plugin_host->OpenChannelToPlugin(client);
-  else
+  } else {
     client->OnError();
+  }
 }
 
 bool PluginService::GetFirstAllowedPluginInfo(
     const GURL& url,
     const std::string& mime_type,
     webkit::npapi::WebPluginInfo* info,
     std::string* actual_mime_type) {
   // GetPluginInfoArray may need to load the plugins, so we need to be
   // on the FILE thread.
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
@@ skipping 137 matching lines @@
     info.mime_types = ASCIIToWide(JoinString(plugins[i].mime_types, '|'));
 
     // These NPAPI entry points will never be called.  TODO(darin): Come up
     // with a cleaner way to register pepper plugins with the NPAPI PluginList,
     // or perhaps refactor the PluginList to be less specific to NPAPI.
     memset(&info.entry_points, 0, sizeof(info.entry_points));
 
     webkit::npapi::PluginList::Singleton()->RegisterInternalPlugin(info);
   }
 }