Implement InstanceIDAndroid using InstanceIDWithSubtype.java

components/gcm_driver/instance_id/instance_id_impl.h

Index: components/gcm_driver/instance_id/instance_id_impl.h
diff --git a/components/gcm_driver/instance_id/instance_id_impl.h b/components/gcm_driver/instance_id/instance_id_impl.h
index dd4569a5f76752dc2f2542418677239d3af10398..d36264c3860bf5413532de1d04c4ed1c4b444530 100644
--- a/components/gcm_driver/instance_id/instance_id_impl.h
+++ b/components/gcm_driver/instance_id/instance_id_impl.h
@@ -66,6 +66,10 @@ class InstanceIDImpl : public InstanceID {
                      const DeleteTokenCallback& callback);
   void DoDeleteID(const DeleteIDCallback& callback);
 
+  // Owned by GCMProfileServiceFactory, which is a dependency of
+  // InstanceIDProfileServiceFactory, which owns this.
+  gcm::InstanceIDHandler* handler_;
+
   gcm::GCMDelayedTaskController delayed_task_controller_;
 
   // The generated Instance ID.