Revert 208315 "Make use of InvalidationService"

trunk/src/chrome/browser/sync/profile_sync_service.cc

Index: trunk/src/chrome/browser/sync/profile_sync_service.cc
===================================================================
--- trunk/src/chrome/browser/sync/profile_sync_service.cc	(revision 208346)
+++ trunk/src/chrome/browser/sync/profile_sync_service.cc	(working copy)
@@ -66,7 +66,6 @@
 #include "google_apis/gaia/gaia_constants.h"
 #include "grit/generated_resources.h"
 #include "net/cookies/cookie_monster.h"
-#include "net/url_request/url_request_context_getter.h"
 #include "sync/api/sync_error.h"
 #include "sync/internal_api/public/configure_reason.h"
 #include "sync/internal_api/public/sync_encryption_handler.h"
@@ -74,6 +73,8 @@
 #include "sync/internal_api/public/util/sync_string_conversions.h"
 #include "sync/js/js_arg_list.h"
 #include "sync/js/js_event_details.h"
+#include "sync/notifier/invalidator_registrar.h"
+#include "sync/notifier/invalidator_state.h"
 #include "sync/util/cryptographer.h"
 #include "ui/base/l10n/l10n_util.h"
 
@@ -113,6 +114,8 @@
 
 static const char* kOAuth2Scopes[] = {
   GaiaConstants::kChromeSyncOAuth2Scope,
+  // GoogleTalk scope is needed for notifications.
+  GaiaConstants::kGoogleTalkOAuth2Scope
 };
 
 static const char* kManagedOAuth2Scopes[] = {
@@ -167,6 +170,7 @@
       profile_(profile),
       // |profile| may be NULL in unit tests.
       sync_prefs_(profile_ ? profile_->GetPrefs() : NULL),
+      invalidator_storage_(profile_ ? profile_->GetPrefs(): NULL),
       sync_service_url_(kDevServerUrl),
       data_type_requested_sync_startup_(false),
       is_first_time_sync_configure_(false),
@@ -183,6 +187,7 @@
       auto_start_enabled_(start_behavior == AUTO_START),
       configure_status_(DataTypeManager::UNKNOWN),
       setup_in_progress_(false),
+      invalidator_state_(syncer::DEFAULT_INVALIDATION_ERROR),
       request_access_token_backoff_(&kRequestAccessTokenBackoffPolicy) {
   // By default, dev, canary, and unbranded Chromium users will go to the
   // development servers. Development servers have more features than standard
@@ -235,6 +240,9 @@
 }
 
 void ProfileSyncService::Initialize() {
+  DCHECK(!invalidator_registrar_.get());
+  invalidator_registrar_.reset(new syncer::InvalidatorRegistrar());
+
   InitSettings();
 
   // We clear this here (vs Shutdown) because we want to remember that an error
@@ -499,7 +507,8 @@
 void ProfileSyncService::CreateBackend() {
   backend_.reset(
       new SyncBackendHost(profile_->GetDebugName(),
-                          profile_, sync_prefs_.AsWeakPtr()));
+                          profile_, sync_prefs_.AsWeakPtr(),
+                          invalidator_storage_.AsWeakPtr()));
 }
 
 bool ProfileSyncService::IsEncryptedDatatypeEnabled() const {
@@ -625,8 +634,62 @@
   // we'll want to start from a fresh SyncDB, so delete any old one that might
   // be there.
   InitializeBackend(!HasSyncSetupCompleted());
+
+  // |backend_| may end up being NULL here in tests (in synchronous
+  // initialization mode).
+  //
+  // TODO(akalin): Fix this horribly non-intuitive behavior (see
+  // http://crbug.com/140354).
+  if (backend_) {
+    backend_->UpdateRegisteredInvalidationIds(
+        invalidator_registrar_->GetAllRegisteredIds());
+    for (AckHandleReplayQueue::const_iterator it = ack_replay_queue_.begin();
+         it != ack_replay_queue_.end(); ++it) {
+      backend_->AcknowledgeInvalidation(it->first, it->second);
+    }
+    ack_replay_queue_.clear();
+  }
 }
 
+void ProfileSyncService::RegisterInvalidationHandler(
+    syncer::InvalidationHandler* handler) {
+  invalidator_registrar_->RegisterHandler(handler);
+}
+
+void ProfileSyncService::UpdateRegisteredInvalidationIds(
+    syncer::InvalidationHandler* handler,
+    const syncer::ObjectIdSet& ids) {
+  invalidator_registrar_->UpdateRegisteredIds(handler, ids);
+
+  // If |backend_| is NULL, its registered IDs will be updated when
+  // it's created and initialized.
+  if (backend_) {
+    backend_->UpdateRegisteredInvalidationIds(
+        invalidator_registrar_->GetAllRegisteredIds());
+  }
+}
+
+void ProfileSyncService::UnregisterInvalidationHandler(
+    syncer::InvalidationHandler* handler) {
+  invalidator_registrar_->UnregisterHandler(handler);
+}
+
+void ProfileSyncService::AcknowledgeInvalidation(
+    const invalidation::ObjectId& id,
+    const syncer::AckHandle& ack_handle) {
+  if (backend_) {
+    backend_->AcknowledgeInvalidation(id, ack_handle);
+  } else {
+    // If |backend_| is NULL, save the acknowledgements to replay when
+    // it's created and initialized.
+    ack_replay_queue_.push_back(std::make_pair(id, ack_handle));
+  }
+}
+
+syncer::InvalidatorState ProfileSyncService::GetInvalidatorState() const {
+  return invalidator_registrar_->GetInvalidatorState();
+}
+
 void ProfileSyncService::OnGetTokenSuccess(
     const OAuth2TokenService::Request* request,
     const std::string& access_token,
@@ -688,7 +751,23 @@
   }
 }
 
+void ProfileSyncService::EmitInvalidationForTest(
+    const invalidation::ObjectId& id,
+    const std::string& payload) {
+  syncer::ObjectIdSet notify_ids;
+  notify_ids.insert(id);
+
+  const syncer::ObjectIdInvalidationMap& invalidation_map =
+      ObjectIdSetToInvalidationMap(notify_ids, payload);
+  OnIncomingInvalidation(invalidation_map);
+}
+
 void ProfileSyncService::Shutdown() {
+  DCHECK(invalidator_registrar_.get());
+  // Reset |invalidator_registrar_| first so that ShutdownImpl cannot
+  // use it.
+  invalidator_registrar_.reset();
+
   if (signin_)
     signin_->signin_global_error()->RemoveProvider(this);
 
@@ -743,6 +822,9 @@
   expect_sync_configuration_aborted_ = false;
   is_auth_in_progress_ = false;
   backend_initialized_ = false;
+  // NULL if we're called from Shutdown().
+  if (invalidator_registrar_)
+    UpdateInvalidatorRegistrarState();
   cached_passphrase_.clear();
   encryption_pending_ = false;
   encrypt_everything_ = false;
@@ -767,6 +849,7 @@
   // Clear prefs (including SyncSetupHasCompleted) before shutting down so
   // PSS clients don't think we're set up while we're shutting down.
   sync_prefs_.ClearPreferences();
+  invalidator_storage_.Clear();
   ClearUnrecoverableError();
   ShutdownImpl(true);
 }
@@ -788,11 +871,6 @@
   FOR_EACH_OBSERVER(Observer, observers_, OnStateChanged());
   // TODO(akalin): Make an Observer subclass that listens and does the
   // event routing.
-  sync_js_controller_.HandleJsEvent("onServiceStateChanged", JsEventDetails());
-}
-
-void ProfileSyncService::NotifySyncCycleCompleted() {
-  FOR_EACH_OBSERVER(Observer, observers_, OnSyncCycleCompleted());
   sync_js_controller_.HandleJsEvent(
       "onServiceStateChanged", JsEventDetails());
 }
@@ -876,6 +954,17 @@
                  weak_factory_.GetWeakPtr()));
 }
 
+void ProfileSyncService::OnInvalidatorStateChange(
+    syncer::InvalidatorState state) {
+  invalidator_state_ = state;
+  UpdateInvalidatorRegistrarState();
+}
+
+void ProfileSyncService::OnIncomingInvalidation(
+    const syncer::ObjectIdInvalidationMap& invalidation_map) {
+  invalidator_registrar_->DispatchInvalidationsToHandlers(invalidation_map);
+}
+
 void ProfileSyncService::OnBackendInitialized(
     const syncer::WeakHandle<syncer::JsBackend>& js_backend,
     const syncer::WeakHandle<syncer::DataTypeDebugInfoListener>&
@@ -919,6 +1008,7 @@
   }
 
   backend_initialized_ = true;
+  UpdateInvalidatorRegistrarState();
 
   sync_js_controller_.AttachJsBackend(js_backend);
   debug_info_listener_ = debug_info_listener;
@@ -967,7 +1057,7 @@
                    GetSessionModelAssociator()->AsWeakPtr()));
   }
   DVLOG(2) << "Notifying observers sync cycle completed";
-  NotifySyncCycleCompleted();
+  NotifyObservers();
 }
 
 void ProfileSyncService::OnExperimentsChanged(
@@ -1063,10 +1153,10 @@
 void ProfileSyncService::OnConnectionStatusChange(
     syncer::ConnectionStatus status) {
   if (use_oauth2_token_ && status == syncer::CONNECTION_AUTH_ERROR) {
-    // Sync server returned error indicating that access token is invalid. It
-    // could be either expired or access is revoked. Let's request another
-    // access token and if access is revoked then request for token will fail
-    // with corresponding error.
+    // Sync or Tango server returned error indicating that access token is
+    // invalid. It could be either expired or access is revoked. Let's request
+    // another access token and if access is revoked then request for token will
+    // fail with corresponding error.
     RequestAccessToken();
   } else {
     const GoogleServiceAuthError auth_error =
@@ -2091,6 +2181,17 @@
   OnUnrecoverableErrorImpl(from_here, message, delete_sync_database);
 }
 
+void ProfileSyncService::UpdateInvalidatorRegistrarState() {
+  const syncer::InvalidatorState effective_state =
+      backend_initialized_ ?
+      invalidator_state_ : syncer::TRANSIENT_INVALIDATION_ERROR;
+  DVLOG(1) << "New invalidator state: "
+           << syncer::InvalidatorStateToString(invalidator_state_)
+           << ", effective state: "
+           << syncer::InvalidatorStateToString(effective_state);
+  invalidator_registrar_->UpdateInvalidatorState(effective_state);
+}
+
 std::string ProfileSyncService::GetEffectiveUsername() {
 #if defined(ENABLE_MANAGED_USERS)
   if (ManagedUserService::ProfileIsManaged(profile_)) {