kiosk: Load pdf extension in kiosk sessions

chrome/browser/extensions/component_loader.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 "chrome/browser/extensions/component_loader.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/files/file_util.h"
@@ skipping 514 matching lines @@
     bool skip_session_components) {
   // No component extension for kiosk app launch splash screen.
   if (skip_session_components)
     return;
 
   // Component extensions needed for kiosk apps.
   AddFileManagerExtension();
 
   // Add virtual keyboard.
   AddKeyboardApp();
+
+#if defined(ENABLE_PLUGINS)
+  Add(pdf_extension_util::GetManifest(),
+      base::FilePath(FILE_PATH_LITERAL("pdf")));
+#endif
 }
 
 void ComponentLoader::AddDefaultComponentExtensionsWithBackgroundPages(
     bool skip_session_components) {
   const base::CommandLine* command_line =
       base::CommandLine::ForCurrentProcess();
 
   // Component extensions with background pages are not enabled during tests
   // because they generate a lot of background behavior that can interfere.
   if (!enable_background_extensions_during_testing &&
@@ skipping 138 matching lines @@
         off_the_record_context, Extension::GetBaseURLFromExtensionId(id));
     storage::FileSystemContext* file_system_context =
         content::BrowserContext::GetStoragePartitionForSite(
             off_the_record_context, site)->GetFileSystemContext();
     file_system_context->EnableTemporaryFileSystemInIncognito();
   }
 #endif
 }
 
 }  // namespace extensions