Revert 176015

chrome/browser/extensions/api/storage/settings_sync_processor.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "chrome/browser/extensions/api/storage/settings_namespace.h"
-#include "chrome/browser/extensions/api/storage/settings_sync_processor.h"
-#include "chrome/browser/extensions/api/storage/settings_sync_util.h"
-#include "content/public/browser/browser_thread.h"
-#include "sync/api/sync_change_processor.h"
-#include "sync/api/sync_data.h"
-#include "sync/protocol/extension_setting_specifics.pb.h"
-
-using content::BrowserThread;
-
-namespace extensions {
-
-SettingsSyncProcessor::SettingsSyncProcessor(
-    const std::string& extension_id,
-    syncer::ModelType type,
-    syncer::SyncChangeProcessor* sync_processor)
-    : extension_id_(extension_id),
-      type_(type),
-      sync_processor_(sync_processor),
-      initialized_(false) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
-  CHECK(type == syncer::EXTENSION_SETTINGS || type == syncer::APP_SETTINGS);
-  CHECK(sync_processor);
-}
-
-SettingsSyncProcessor::~SettingsSyncProcessor() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
-}
-
-void SettingsSyncProcessor::Init(const DictionaryValue& initial_state) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
-  CHECK(!initialized_) << "Init called multiple times";
-
-  for (DictionaryValue::Iterator i(initial_state); i.HasNext(); i.Advance())
-    synced_keys_.insert(i.key());
-
-  initialized_ = true;
-}
-
-syncer::SyncError SettingsSyncProcessor::SendChanges(
-    const ValueStoreChangeList& changes) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
-  CHECK(initialized_) << "Init not called";
-
-  syncer::SyncChangeList sync_changes;
-  std::set<std::string> added_keys;
-  std::set<std::string> deleted_keys;
-
-  for (ValueStoreChangeList::const_iterator i = changes.begin();
-      i != changes.end(); ++i) {
-    const std::string& key = i->key();
-    const Value* value = i->new_value();
-    if (value) {
-      if (synced_keys_.count(key)) {
-        // New value, key is synced; send ACTION_UPDATE.
-        sync_changes.push_back(settings_sync_util::CreateUpdate(
-            extension_id_, key, *value, type_));
-      } else {
-        // New value, key is not synced; send ACTION_ADD.
-        sync_changes.push_back(settings_sync_util::CreateAdd(
-            extension_id_, key, *value, type_));
-        added_keys.insert(key);
-      }
-    } else {
-      if (synced_keys_.count(key)) {
-        // Clearing value, key is synced; send ACTION_DELETE.
-        sync_changes.push_back(settings_sync_util::CreateDelete(
-            extension_id_, key, type_));
-        deleted_keys.insert(key);
-      } else {
-        LOG(WARNING) << "Deleted " << key << " but not in synced_keys_";
-      }
-    }
-  }
-
-  if (sync_changes.empty())
-    return syncer::SyncError();
-
-  syncer::SyncError error =
-      sync_processor_->ProcessSyncChanges(FROM_HERE, sync_changes);
-  if (error.IsSet())
-    return error;
-
-  synced_keys_.insert(added_keys.begin(), added_keys.end());
-  for (std::set<std::string>::iterator i = deleted_keys.begin();
-      i != deleted_keys.end(); ++i) {
-    synced_keys_.erase(*i);
-  }
-
-  return syncer::SyncError();
-}
-
-void SettingsSyncProcessor::NotifyChanges(const ValueStoreChangeList& changes) {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
-  CHECK(initialized_) << "Init not called";
-
-  for (ValueStoreChangeList::const_iterator i = changes.begin();
-      i != changes.end(); ++i) {
-    if (i->new_value())
-      synced_keys_.insert(i->key());
-    else
-      synced_keys_.erase(i->key());
-  }
-}
-
-}  // namespace extensions