Revert of Move some sync/notifier to components/invalidation

sync/notifier/fake_invalidation_state_tracker.h

Index: sync/notifier/fake_invalidation_state_tracker.h
diff --git a/sync/notifier/fake_invalidation_state_tracker.h b/sync/notifier/fake_invalidation_state_tracker.h
new file mode 100644
index 0000000000000000000000000000000000000000..eb62256f83dd041049e913e6f1d9ffcac6524af4
--- /dev/null
+++ b/sync/notifier/fake_invalidation_state_tracker.h
@@ -0,0 +1,42 @@
+// 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.
+
+#ifndef SYNC_NOTIFIER_FAKE_INVALIDATION_STATE_TRACKER_H_
+#define SYNC_NOTIFIER_FAKE_INVALIDATION_STATE_TRACKER_H_
+
+#include "base/memory/weak_ptr.h"
+#include "sync/notifier/invalidation_state_tracker.h"
+
+namespace syncer {
+
+// InvalidationStateTracker implementation that simply keeps track of
+// the max versions and invalidation state in memory.
+class FakeInvalidationStateTracker
+    : public InvalidationStateTracker,
+      public base::SupportsWeakPtr<FakeInvalidationStateTracker> {
+ public:
+  FakeInvalidationStateTracker();
+  virtual ~FakeInvalidationStateTracker();
+
+  // InvalidationStateTracker implementation.
+  virtual void ClearAndSetNewClientId(const std::string& client_id) OVERRIDE;
+  virtual std::string GetInvalidatorClientId() const OVERRIDE;
+  virtual void SetBootstrapData(const std::string& data) OVERRIDE;
+  virtual std::string GetBootstrapData() const OVERRIDE;
+  virtual void SetSavedInvalidations(
+      const UnackedInvalidationsMap& states) OVERRIDE;
+  virtual UnackedInvalidationsMap GetSavedInvalidations() const OVERRIDE;
+  virtual void Clear() OVERRIDE;
+
+  static const int64 kMinVersion;
+
+ private:
+  std::string invalidator_client_id_;
+  std::string bootstrap_data_;
+  UnackedInvalidationsMap unacked_invalidations_map_;
+};
+
+}  // namespace syncer
+
+#endif  // SYNC_NOTIFIER_FAKE_INVALIDATION_STATE_TRACKER_H_