build: Enable auto raw pointer deduction check on linux.

components/omnibox/browser/in_memory_url_index_unittest.cc

Index: components/omnibox/browser/in_memory_url_index_unittest.cc
diff --git a/components/omnibox/browser/in_memory_url_index_unittest.cc b/components/omnibox/browser/in_memory_url_index_unittest.cc
index 57751d876e357a104c8d836b3aeeccc2ace1845f..1e08dce4404185bb444ebfae4d57c4dd986d9cb8 100644
--- a/components/omnibox/browser/in_memory_url_index_unittest.cc
+++ b/components/omnibox/browser/in_memory_url_index_unittest.cc
@@ -792,7 +792,7 @@ TEST_F(InMemoryURLIndexTest, TrimHistoryIds) {
 
   // Each next group should fill almost everything, while the previous group
   // should occupy what's left.
-  auto error_position = std::adjacent_find(
+  auto* error_position = std::adjacent_find(
       std::begin(item_groups), std::end(item_groups),
       [&](const ItemGroup& previous, const ItemGroup& current) {
         auto ids = GetHistoryIdsUpTo(current.max_id);