build: Enable auto raw pointer deduction check on linux.

chrome/browser/content_settings/content_settings_pref_provider_unittest.cc

Index: chrome/browser/content_settings/content_settings_pref_provider_unittest.cc
diff --git a/chrome/browser/content_settings/content_settings_pref_provider_unittest.cc b/chrome/browser/content_settings/content_settings_pref_provider_unittest.cc
index dc79a451c9da4318a14510839604eeeb6b5f3dfc..65d486fe9362526adbf09450cba069714213d043 100644
--- a/chrome/browser/content_settings/content_settings_pref_provider_unittest.cc
+++ b/chrome/browser/content_settings/content_settings_pref_provider_unittest.cc
@@ -224,7 +224,7 @@ TEST_F(PrefProviderTest, DiscardObsoleteLastUsagePreferences) {
 
   // Check that last_used data has been deleted.
   EXPECT_TRUE(prefs->GetDictionary(kGeolocationPrefPath)->empty());
-  auto mic_prefs = prefs->GetDictionary(kMicPrefPath);
+  auto* mic_prefs = prefs->GetDictionary(kMicPrefPath);
   const base::DictionaryValue* mic_result_pattern_data;
   ASSERT_TRUE(mic_prefs->GetDictionaryWithoutPathExpansion(
       kPattern, &mic_result_pattern_data));