Mark Render{Frame,View}::GetWebkitPreferences() return values as const.

content/public/common/webplugininfo.h

 // 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.
 
 #ifndef CONTENT_PUBLIC_COMMON_WEBPLUGININFO_H_
 #define CONTENT_PUBLIC_COMMON_WEBPLUGININFO_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 25 matching lines @@
   std::vector<std::string> file_extensions;
 
   // Description of the mime type.
   base::string16 description;
 
   // Extra parameters to include when instantiating the plugin.
   std::vector<base::string16> additional_param_names;
   std::vector<base::string16> additional_param_values;
 };
 
-// Describes an available NPAPI or Pepper plugin.
+// Describes an available Pepper plugin.
 struct CONTENT_EXPORT WebPluginInfo {
   enum PluginType {
     PLUGIN_TYPE_PEPPER_IN_PROCESS,
     PLUGIN_TYPE_PEPPER_OUT_OF_PROCESS,
     PLUGIN_TYPE_BROWSER_PLUGIN
   };
 
   WebPluginInfo();
   WebPluginInfo(const WebPluginInfo& rhs);
   ~WebPluginInfo();
@@ skipping 33 matching lines @@
   // Plugin type. See the PluginType enum.
   int type;
 
   // When type is PLUGIN_TYPE_PEPPER_* this indicates the permission bits.
   int32_t pepper_permissions;
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_COMMON_WEBPLUGININFO_H_