Linux: bit hacky way to ensure Pepper plugins get loaded by zygote.

chrome/common/pepper_plugin_registry.h

 // 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.
 
 #ifndef CHROME_COMMON_PEPPER_PLUGIN_REGISTRY_H_
 #define CHROME_COMMON_PEPPER_PLUGIN_REGISTRY_H_
 #pragma once
 
 #include <string>
 #include <map>
 #include <vector>
 
 #include "webkit/glue/plugins/pepper_plugin_module.h"
 
 struct PepperPluginInfo {
-  FilePath path;  // Internal plugins are of the form "internal-[name]".
+  PepperPluginInfo();  // Needed to initialize |is_internal|.
+
+  bool is_internal;  // Defaults to false (see constructor).
+  FilePath path;  // Internal plugins have "internal-[name]" as path.
   std::vector<std::string> mime_types;
   std::string name;
   std::string description;
   std::string file_extensions;
   std::string type_descriptions;
 };
 
 // This class holds references to all of the known pepper plugin modules.
 class PepperPluginRegistry {
  public:
   static PepperPluginRegistry* GetInstance();
 
   // Returns the list of known pepper plugins.  This method is static so that
   // it can be used by the browser process, which has no need to load the
   // pepper plugin modules.
   static void GetList(std::vector<PepperPluginInfo>* plugins);
 
+  // Loads the (native) libraries but does not initialize them (i.e., does not
+  // call PPP_InitializeModule). This is needed by the zygote on Linux to get
+  // access to the plugins before entering the sandbox.
+  static void PreloadModules();
+
   pepper::PluginModule* GetModule(const FilePath& path) const;
 
  private:
   static void GetPluginInfoFromSwitch(std::vector<PepperPluginInfo>* plugins);
   static void GetExtraPlugins(std::vector<PepperPluginInfo>* plugins);
 
   struct InternalPluginInfo : public PepperPluginInfo {
+    InternalPluginInfo();  // Sets |is_internal|.
     pepper::PluginModule::EntryPoints entry_points;
   };
   typedef std::vector<InternalPluginInfo> InternalPluginInfoList;
   static void GetInternalPluginInfo(InternalPluginInfoList* plugin_info);
 
   PepperPluginRegistry();
 
   typedef scoped_refptr<pepper::PluginModule> ModuleHandle;
   typedef std::map<FilePath, ModuleHandle> ModuleMap;
   ModuleMap modules_;
 };
 
 #endif  // CHROME_COMMON_PEPPER_PLUGIN_REGISTRY_H_