[Sync] Initial support for encrypting any datatype (no UI hookup yet).

chrome/browser/sync/profile_sync_service.cc

Index: chrome/browser/sync/profile_sync_service.cc
diff --git a/chrome/browser/sync/profile_sync_service.cc b/chrome/browser/sync/profile_sync_service.cc
index bb255856cd163115108dca826f726b8b5ef0d03b..1d9b7da648c626a08cb415c5ac8e6148e0ebbd1a 100644
--- a/chrome/browser/sync/profile_sync_service.cc
+++ b/chrome/browser/sync/profile_sync_service.cc
@@ -432,11 +432,7 @@ void ProfileSyncService::CreateBackend() {
 }
 
 bool ProfileSyncService::IsEncryptedDatatypeEnabled() const {
-  // Currently on passwords are an encrypted datatype, so
-  // we check to see if it is enabled.
-  syncable::ModelTypeSet types;
-  GetPreferredDataTypes(&types);
-  return types.count(syncable::PASSWORDS) != 0;
+  return encrypted_types_.size() > 0;
 }
 
 void ProfileSyncService::StartUp() {
@@ -748,6 +744,14 @@ void ProfileSyncService::OnPassphraseAccepted() {
   wizard_.Step(SyncSetupWizard::DONE);
 }
 
+void ProfileSyncService::OnEncryptionComplete(
+    const syncable::ModelTypeSet& encrypted_types) {
+  if (encrypted_types_ != encrypted_types) {
+    encrypted_types_ = encrypted_types;
+    NotifyObservers();
+  }
+}
+
 void ProfileSyncService::ShowLoginDialog(gfx::NativeWindow parent_window) {
   // TODO(johnnyg): File a bug to make sure this doesn't happen.
   if (!cros_user_.empty()) {
@@ -1165,6 +1169,16 @@ void ProfileSyncService::SetPassphrase(const std::string& passphrase,
     tried_setting_explicit_passphrase_ = true;
 }
 
+void ProfileSyncService::EncryptDataTypes(
+    const syncable::ModelTypeSet& encrypted_types) {
+  backend_->EncryptDataTypes(encrypted_types);
+}
+
+void ProfileSyncService::GetEncryptedDataTypes(
+    syncable::ModelTypeSet* encrypted_types) const {
+  *encrypted_types = encrypted_types_;
+}
+
 void ProfileSyncService::Observe(NotificationType type,
                                  const NotificationSource& source,
                                  const NotificationDetails& details) {