kiosk: Load pdf extension in kiosk sessions

chrome/browser/extensions/component_loader.cc

Index: chrome/browser/extensions/component_loader.cc
diff --git a/chrome/browser/extensions/component_loader.cc b/chrome/browser/extensions/component_loader.cc
index b4bf6f06196c3ebb17472b9ca624040a913a68d6..f2b5152ab795f9a9ee8ff46e4062e9d8f2b7679f 100644
--- a/chrome/browser/extensions/component_loader.cc
+++ b/chrome/browser/extensions/component_loader.cc
@@ -532,6 +532,11 @@ void ComponentLoader::AddDefaultComponentExtensionsForKioskMode(
 
   // Add virtual keyboard.
   AddKeyboardApp();
+
+#if defined(ENABLE_PLUGINS)
+  Add(pdf_extension_util::GetManifest(),
+      base::FilePath(FILE_PATH_LITERAL("pdf")));
+#endif
 }
 
 void ComponentLoader::AddDefaultComponentExtensionsWithBackgroundPages(