Disable plugins on the Mac by default until JS plumbing...

webkit/glue/plugins/plugin_list_mac.mm

 // Copyright (c) 2006-2009 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 "config.h"
 
 #include "webkit/glue/plugins/plugin_list.h"
 
 #import <Foundation/Foundation.h>
 
@@ skipping 50 matching lines @@
   file_util::FileEnumerator enumerator(path,
                                        false, // not recursive
                                        file_util::FileEnumerator::DIRECTORIES);
   for (FilePath path = enumerator.Next(); !path.value().empty();
        path = enumerator.Next()) {
     LoadPlugin(path);
   }
 }
 
 bool PluginList::ShouldLoadPlugin(const WebPluginInfo& info) {
-
+  // TODO(port): uncomment the next line to enable plugins--disabled by
+  // default so that public dev builds fall back correctly to the no-plugin
+  // code on pages with plugins.
+  return false;
+  
   // Hierarchy check
   // (we're loading plugins hierarchically from Library folders, so plugins we
   //  encounter earlier must override plugins we encounter later)
 
   for (size_t i = 0; i < plugins_.size(); ++i) {
     if (plugins_[i].path.BaseName() == info.path.BaseName()) {
       return false;  // We already have a loaded plugin higher in the hierarchy.
     }
   }
 
   return true;
 }
 
 void PluginList::LoadInternalPlugins() {
   // none for now
 }
 
 } // namespace NPAPI