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

chrome/common/pepper_plugin_registry.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 "chrome/common/pepper_plugin_registry.h"
 
 #include "base/command_line.h"
 #include "base/file_util.h"
+#include "base/native_library.h"
 #include "base/path_service.h"
 #include "base/string_util.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "remoting/client/plugin/pepper_entrypoints.h"
 
+PepperPluginInfo::PepperPluginInfo() : is_internal(false) {
+}
+
 // static
 PepperPluginRegistry* PepperPluginRegistry::GetInstance() {
   static PepperPluginRegistry registry;
   return &registry;
 }
 
 // static
 void PepperPluginRegistry::GetList(std::vector<PepperPluginInfo>* plugins) {
   InternalPluginInfoList internal_plugin_info;
   GetInternalPluginInfo(&internal_plugin_info);
   for (InternalPluginInfoList::const_iterator it =
          internal_plugin_info.begin();
        it != internal_plugin_info.end();
        ++it) {
     plugins->push_back(*it);
   }
 
   GetPluginInfoFromSwitch(plugins);
   GetExtraPlugins(plugins);
 }
 
 // static
+void PepperPluginRegistry::PreloadModules() {
+  std::vector<PepperPluginInfo> plugins;
+  GetList(&plugins);
+  for (size_t i = 0; i < plugins.size(); ++i) {
+    if (!plugins[i].is_internal) {
+      base::NativeLibrary library = base::LoadNativeLibrary(plugins[i].path);
+      LOG_IF(WARNING, !library) << "Unable to load plugin "
+                                << plugins[i].path.value();
+    }
+  }
+}
+
+// static
 void PepperPluginRegistry::GetPluginInfoFromSwitch(
     std::vector<PepperPluginInfo>* plugins) {
   const std::wstring& value = CommandLine::ForCurrentProcess()->GetSwitchValue(
       switches::kRegisterPepperPlugins);
   if (value.empty())
     return;
 
   // FORMAT:
   // command-line = <plugin-entry> + *( LWS + "," + LWS + <plugin-entry> )
   // plugin-entry = <file-path> + ["#" + <name> + ["#" + <description>]] +
@@ skipping 34 matching lines @@
     PepperPluginInfo pdf;
     pdf.path = path;
     pdf.name = "Chrome PDF Viewer";
     pdf.mime_types.push_back("application/pdf");
     pdf.file_extensions = "pdf";
     pdf.type_descriptions = "Portable Document Format";
     plugins->push_back(pdf);
   }
 }
 
+PepperPluginRegistry::InternalPluginInfo::InternalPluginInfo() {
+  is_internal = true;
+}
+
 // static
 void PepperPluginRegistry::GetInternalPluginInfo(
     InternalPluginInfoList* plugin_info) {
   // Currently, to centralize the internal plugin registration logic, we
   // hardcode the list of plugins, mimetypes, and registration information
   // in this function.  This is gross, but because the GetList() function is
   // called from both the renderer and browser the other option is to force a
   // special register function for each plugin to be called by both
   // RendererMain() and BrowserMain().  This seemed like the better tradeoff.
   //
   // TODO(ajwong): Think up a better way to maintain the plugin registration
   // information. Pehraps by construction of a singly linked list of
   // plugin initializers that is built with static initializers?
 
 #if defined(ENABLE_REMOTING)
   if (CommandLine::ForCurrentProcess()->HasSwitch(
       switches::kEnableChromoting)) {
     InternalPluginInfo info;
     // Add the chromoting plugin.
+    DCHECK(info.is_internal);
     info.path =
         FilePath(FILE_PATH_LITERAL("internal-chromoting"));
     info.mime_types.push_back("pepper-application/x-chromoting");
     info.entry_points.get_interface = remoting::PPP_GetInterface;
     info.entry_points.initialize_module = remoting::PPP_InitializeModule;
     info.entry_points.shutdown_module = remoting::PPP_ShutdownModule;
 
     plugin_info->push_back(info);
   }
 #endif
@@ skipping 33 matching lines @@
   for (size_t i = 0; i < plugins.size(); ++i) {
     const FilePath& path = plugins[i].path;
     ModuleHandle module = pepper::PluginModule::CreateModule(path);
     if (!module) {
       DLOG(ERROR) << "Failed to load pepper module: " << path.value();
       continue;
     }
     modules_[path] = module;
   }
 }