[Sync] Move //components/sync to the syncer namespace.

ios/chrome/browser/sync/fake_sync_service_factory.cc

Index: ios/chrome/browser/sync/fake_sync_service_factory.cc
diff --git a/ios/chrome/browser/sync/fake_sync_service_factory.cc b/ios/chrome/browser/sync/fake_sync_service_factory.cc
index 02b4f3027a7db78c7b70f8a27434e356e0a768d5..144f13fe0ec7d43665cbd999136b2a1b5e1e0869 100644
--- a/ios/chrome/browser/sync/fake_sync_service_factory.cc
+++ b/ios/chrome/browser/sync/fake_sync_service_factory.cc
@@ -18,12 +18,10 @@ class KeyedFakeSyncService : public KeyedService {
  public:
   KeyedFakeSyncService() {}
 
-  sync_driver::FakeSyncService* fake_sync_service() {
-    return &fake_sync_service_;
-  }
+  syncer::FakeSyncService* fake_sync_service() { return &fake_sync_service_; }
 
  private:
-  sync_driver::FakeSyncService fake_sync_service_;
+  syncer::FakeSyncService fake_sync_service_;
 };
 
 }  // namespace
@@ -36,7 +34,7 @@ FakeSyncServiceFactory* FakeSyncServiceFactory::GetInstance() {
 }
 
 // static
-sync_driver::FakeSyncService* FakeSyncServiceFactory::GetForBrowserState(
+syncer::FakeSyncService* FakeSyncServiceFactory::GetForBrowserState(
     ios::ChromeBrowserState* browser_state) {
   return static_cast<KeyedFakeSyncService*>(
              FakeSyncServiceFactory::GetInstance()->GetServiceForBrowserState(
@@ -45,8 +43,7 @@ sync_driver::FakeSyncService* FakeSyncServiceFactory::GetForBrowserState(
 }
 
 // static
-sync_driver::FakeSyncService*
-FakeSyncServiceFactory::GetForBrowserStateIfExists(
+syncer::FakeSyncService* FakeSyncServiceFactory::GetForBrowserStateIfExists(
     ios::ChromeBrowserState* browser_state) {
   return static_cast<KeyedFakeSyncService*>(
              FakeSyncServiceFactory::GetInstance()->GetServiceForBrowserState(