Implement gnome-keyring for OSCrypt

components/os_crypt/key_storage_linux.h

Index: components/os_crypt/key_storage_linux.h
diff --git a/components/os_crypt/key_storage_linux.h b/components/os_crypt/key_storage_linux.h
index 1808706f4d5e1ae427eecf6d5ca2edb66f357d1d..394b6b38173be0b67fa890974ba40e6fcab08ac1 100644
--- a/components/os_crypt/key_storage_linux.h
+++ b/components/os_crypt/key_storage_linux.h
@@ -10,7 +10,10 @@
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/single_thread_task_runner.h"
+
+namespace base {
+class SingleThreadTaskRunner;
+}  // namespace base
 
 // An API for retrieving OSCrypt's password from the system's password storage
 // service.