Convert //components/dom_distiller from scoped_ptr to std::unique_ptr

components/dom_distiller/core/distilled_page_prefs_unittests.cc

Index: components/dom_distiller/core/distilled_page_prefs_unittests.cc
diff --git a/components/dom_distiller/core/distilled_page_prefs_unittests.cc b/components/dom_distiller/core/distilled_page_prefs_unittests.cc
index 9c871539ab35fadbea56256058106b24a5a5cf7a..b034255c2e4bb8c558c00ea4815e4f75c6d4a6d8 100644
--- a/components/dom_distiller/core/distilled_page_prefs_unittests.cc
+++ b/components/dom_distiller/core/distilled_page_prefs_unittests.cc
@@ -54,8 +54,8 @@ class DistilledPagePrefsTest : public testing::Test {
     distilled_page_prefs_.reset(new DistilledPagePrefs(pref_service_.get()));
   }
 
-  scoped_ptr<user_prefs::TestingPrefServiceSyncable> pref_service_;
-  scoped_ptr<DistilledPagePrefs> distilled_page_prefs_;
+  std::unique_ptr<user_prefs::TestingPrefServiceSyncable> pref_service_;
+  std::unique_ptr<DistilledPagePrefs> distilled_page_prefs_;
 
  private:
   base::MessageLoop message_loop_;