Enable the pdf plugin by default.

chrome/browser/plugin_updater.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/browser/plugin_updater.h"
 
 #include <string>
 #include <vector>
 
 #include "base/path_service.h"
@@ skipping 70 matching lines @@
 }
 
 void EnablePluginFile(bool enable, const FilePath::StringType& path) {
   FilePath file_path(path);
   if (enable && !PluginGroup::IsPluginPathDisabledByPolicy(file_path))
     NPAPI::PluginList::Singleton()->EnablePlugin(file_path);
   else
     NPAPI::PluginList::Singleton()->DisablePlugin(file_path);
 }
 
-#if defined(OS_CHROMEOS)
 static bool enable_internal_pdf_ = true;
-#else
-static bool enable_internal_pdf_ = false;
-#endif
 
 void DisablePluginGroupsFromPrefs(Profile* profile) {
   bool update_internal_dir = false;
   FilePath last_internal_dir =
   profile->GetPrefs()->GetFilePath(prefs::kPluginsLastInternalDirectory);
   FilePath cur_internal_dir;
   if (PathService::Get(chrome::DIR_INTERNAL_PLUGINS, &cur_internal_dir) &&
       cur_internal_dir != last_internal_dir) {
     update_internal_dir = true;
     profile->GetPrefs()->SetFilePath(
@@ skipping 131 matching lines @@
        it != plugin_groups.end();
        ++it) {
     // Don't save preferences for vulnerable pugins.
     if (!(*it)->IsVulnerable()) {
       plugins_list->Append((*it)->GetSummary());
     }
   }
 }
 
 }  // namespace plugin_updater