Don't load the old layout test plugin in DRT.

webkit/support/webkit_support_glue.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 "webkit/glue/webkit_glue.h"
 
 #include "base/base_paths.h"
 #include "base/path_service.h"
 #include "googleurl/src/gurl.h"
 #include "webkit/glue/plugins/plugin_list.h"
 
 // Functions needed by webkit_glue.
 
 namespace webkit_glue {
 
 void GetPlugins(bool refresh, std::vector<WebPluginInfo>* plugins) {
   NPAPI::PluginList::Singleton()->GetPlugins(refresh, plugins);
+  // Don't load the forked npapi_layout_test_plugin in DRT, we only
+  // want to use the upstream version TestNetscapePlugIn.  We don't need to
+  // blacklist on Mac because DRT Mac already uses the upstream version of
+  // TestNetscapePlugIn.
+  const FilePath::StringType kPluginBlackList[] = {
+    FILE_PATH_LITERAL("npapi_layout_test_plugin.dll"),
+    FILE_PATH_LITERAL("libnpapi_layout_test_plugin.so"),
+  };
+  for (int i = plugins->size() - 1; i >= 0; --i) {
+    WebPluginInfo plugin_info = plugins->at(i);
+    for (size_t j = 0; j < arraysize(kPluginBlackList); ++j) {
+      if (plugin_info.path.BaseName() == FilePath(kPluginBlackList[j])) {
+        NPAPI::PluginList::Singleton()->DisablePlugin(plugin_info.path);
+        plugins->erase(plugins->begin() + i);
+      }
+    }
+  }
 }
 
 bool IsDefaultPluginEnabled() {
   return false;
 }
 
 bool IsPluginRunningInRendererProcess() {
   return true;
 }
 
@@ skipping 60 matching lines @@
   return -1;
 }
 
 bool GetFontTable(int fd, uint32_t table, uint8_t* output,
                   size_t* output_length) {
   return false;
 }
 #endif
 
 }  // namespace webkit_glue