[iOS] Add InMemoryURLIndexFactory::GetDefaultFactory()

ios/chrome/browser/autocomplete/in_memory_url_index_factory.cc

Index: ios/chrome/browser/autocomplete/in_memory_url_index_factory.cc
diff --git a/ios/chrome/browser/autocomplete/in_memory_url_index_factory.cc b/ios/chrome/browser/autocomplete/in_memory_url_index_factory.cc
index da2d26b67b0babce099bc63b35f5acfc049a6c27..232f9d064e9f74d1fc6ab5d14800ea4eab7d308a 100644
--- a/ios/chrome/browser/autocomplete/in_memory_url_index_factory.cc
+++ b/ios/chrome/browser/autocomplete/in_memory_url_index_factory.cc
@@ -19,6 +19,29 @@
 
 namespace ios {
 
+namespace {
+
+scoped_ptr<KeyedService> BuildInMemoryURLIndex(web::BrowserState* context) {
+  ios::ChromeBrowserState* browser_state =
+      ios::ChromeBrowserState::FromBrowserState(context);
+
+  SchemeSet schemes_to_whilelist;
+  schemes_to_whilelist.insert(kChromeUIScheme);
+
+  // Do not force creation of the HistoryService if saving history is disabled.
+  scoped_ptr<InMemoryURLIndex> in_memory_url_index(new InMemoryURLIndex(
+      ios::BookmarkModelFactory::GetForBrowserState(browser_state),
+      ios::HistoryServiceFactory::GetForBrowserState(
+          browser_state, ServiceAccessType::IMPLICIT_ACCESS),
+      web::WebThread::GetBlockingPool(), browser_state->GetStatePath(),
+      browser_state->GetPrefs()->GetString(ios::prefs::kAcceptLanguages),
+      schemes_to_whilelist));
+  in_memory_url_index->Init();
+  return in_memory_url_index.Pass();
+}
+
+}  // namespace
+
 // static
 InMemoryURLIndex* InMemoryURLIndexFactory::GetForBrowserState(
     ios::ChromeBrowserState* browser_state) {
@@ -41,24 +64,15 @@ InMemoryURLIndexFactory::InMemoryURLIndexFactory()
 
 InMemoryURLIndexFactory::~InMemoryURLIndexFactory() {}
 
+// static
+BrowserStateKeyedServiceFactory::TestingFactoryFunction
+InMemoryURLIndexFactory::GetDefaultFactory() {
+  return &BuildInMemoryURLIndex;
+}
+
 scoped_ptr<KeyedService> InMemoryURLIndexFactory::BuildServiceInstanceFor(
     web::BrowserState* context) const {
-  ios::ChromeBrowserState* browser_state =
-      ios::ChromeBrowserState::FromBrowserState(context);
-
-  SchemeSet schemes_to_whilelist;
-  schemes_to_whilelist.insert(kChromeUIScheme);
-
-  // Do not force creation of the HistoryService if saving history is disabled.
-  scoped_ptr<InMemoryURLIndex> in_memory_url_index(new InMemoryURLIndex(
-      ios::BookmarkModelFactory::GetForBrowserState(browser_state),
-      ios::HistoryServiceFactory::GetForBrowserState(
-          browser_state, ServiceAccessType::IMPLICIT_ACCESS),
-      web::WebThread::GetBlockingPool(), browser_state->GetStatePath(),
-      browser_state->GetPrefs()->GetString(ios::prefs::kAcceptLanguages),
-      schemes_to_whilelist));
-  in_memory_url_index->Init();
-  return in_memory_url_index.Pass();
+  return BuildInMemoryURLIndex(context);
 }
 
 web::BrowserState* InMemoryURLIndexFactory::GetBrowserStateToUse(