components: Change auto to not deduce raw pointers.

components/precache/core/precache_session_table_unittest.cc

Index: components/precache/core/precache_session_table_unittest.cc
diff --git a/components/precache/core/precache_session_table_unittest.cc b/components/precache/core/precache_session_table_unittest.cc
index c0d37d502730e7523d430121f2d58e97e72e934b..ed4fcc5477dc5dbba7d75390eb930ee79c88f9cd 100644
--- a/components/precache/core/precache_session_table_unittest.cc
+++ b/components/precache/core/precache_session_table_unittest.cc
@@ -36,7 +36,7 @@ TEST_F(PrecacheSessionTableTest, SaveAndGetUnfinishedWork) {
       new PrecacheUnfinishedWork());
   unfinished_work->add_top_host()->set_hostname("foo.com");
   unfinished_work->add_top_host()->set_hostname("bar.com");
-  auto s = unfinished_work->mutable_config_settings();
+  auto* s = unfinished_work->mutable_config_settings();
   s->set_top_sites_count(11);
   s->add_forced_site("baz.com");
   s->set_top_resources_count(12);