Convert //ios from scoped_ptr to std::unique_ptr.

ios/chrome/browser/autocomplete/autocomplete_classifier_factory.cc

Index: ios/chrome/browser/autocomplete/autocomplete_classifier_factory.cc
diff --git a/ios/chrome/browser/autocomplete/autocomplete_classifier_factory.cc b/ios/chrome/browser/autocomplete/autocomplete_classifier_factory.cc
index 22dc1e35bb52cffdeeedaafb626340982402af37..e1c429b4baee2bbb29c62dce6a2b2b99ada6872b 100644
--- a/ios/chrome/browser/autocomplete/autocomplete_classifier_factory.cc
+++ b/ios/chrome/browser/autocomplete/autocomplete_classifier_factory.cc
@@ -4,6 +4,7 @@
 
 #include "ios/chrome/browser/autocomplete/autocomplete_classifier_factory.h"
 
+#include "base/memory/ptr_util.h"
 #include "base/memory/singleton.h"
 #include "components/keyed_service/ios/browser_state_dependency_manager.h"
 #include "components/omnibox/browser/autocomplete_classifier.h"
@@ -19,15 +20,15 @@
 namespace ios {
 namespace {
 
-scoped_ptr<KeyedService> BuildAutocompleteClassifier(
+std::unique_ptr<KeyedService> BuildAutocompleteClassifier(
     web::BrowserState* context) {
   ios::ChromeBrowserState* browser_state =
       ios::ChromeBrowserState::FromBrowserState(context);
-  return make_scoped_ptr(new AutocompleteClassifier(
-      make_scoped_ptr(new AutocompleteController(
-          make_scoped_ptr(new AutocompleteProviderClientImpl(browser_state)),
+  return base::WrapUnique(new AutocompleteClassifier(
+      base::WrapUnique(new AutocompleteController(
+          base::WrapUnique(new AutocompleteProviderClientImpl(browser_state)),
           nullptr, AutocompleteClassifier::kDefaultOmniboxProviders)),
-      make_scoped_ptr(new AutocompleteSchemeClassifierImpl)));
+      base::WrapUnique(new AutocompleteSchemeClassifierImpl)));
 }
 
 }  // namespace
@@ -61,7 +62,8 @@ AutocompleteClassifierFactory::AutocompleteClassifierFactory()
 
 AutocompleteClassifierFactory::~AutocompleteClassifierFactory() {}
 
-scoped_ptr<KeyedService> AutocompleteClassifierFactory::BuildServiceInstanceFor(
+std::unique_ptr<KeyedService>
+AutocompleteClassifierFactory::BuildServiceInstanceFor(
     web::BrowserState* context) const {
   return BuildAutocompleteClassifier(context);
 }