Do not attempt to load 32-bit NPAPI plugins on 64-bit.

content/common/plugin_list_win.cc

 // Copyright (c) 2012 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 "content/common/plugin_list.h"
 
 #include <set>
 
 #include "base/basictypes.h"
 #include "base/file_util.h"
@@ skipping 445 matching lines @@
       }
     }
 
   } else if (filename == kOldWMPPlugin) {
     for (size_t j = 0; j < plugins->size(); ++j) {
       if ((*plugins)[j].path.BaseName().value() == kNewWMPPlugin)
         return false;
     }
   }
 
-#if !defined(ARCH_CPU_X86_64)
+  base::FilePath plugin_path(info.path);
+#if defined(ARCH_CPU_X86_64)
+  // The plugin in question could be a 32 bit plugin which we cannot load.
+  if (IsValid32BitImage(base::MakeAbsoluteFilePath(plugin_path)))
+    return false;
+#else
   // The plugin in question could be a 64 bit plugin which we cannot load.
-  base::FilePath plugin_path(info.path);
   if (!IsValid32BitImage(base::MakeAbsoluteFilePath(plugin_path)))
     return false;
 #endif
   return true;
 }
 
 }  // namespace content