Move some sync/notifier to components/invalidation

components/invalidation/invalidation_export.h

Index: components/invalidation/invalidation_export.h
diff --git a/components/invalidation/invalidation_export.h b/components/invalidation/invalidation_export.h
new file mode 100644
index 0000000000000000000000000000000000000000..08683bee2b3c5909ff4d0ac91bc8e7763ddcb769
--- /dev/null
+++ b/components/invalidation/invalidation_export.h
@@ -0,0 +1,21 @@
+// Copyright 2014 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 COMPONENTS_INVALIDATION_INVALIDATION_EXPORT_H_
+#define COMPONENTS_INVALIDATION_INVALIDATION_EXPORT_H_
+
+// The files under components/invalidation do not currently support a shared
+// library build.  There's no point in attaching attributes to them.
+//
+// Many of the files in this directory are imports from sync/notifier, which
+// did support a shared library build.  We can use this existing set of export
+// declarations as a starting point when we prepare this directory for a shared
+// library build.
+//
+// For now, we provide dummy definitions of these tags.
+
+#define INVALIDATION_EXPORT
+#define INVALIDATION_EXPORT_PRIVATE
+
+#endif  // COMPONENTS_INVALIDATION_INVALIDATION_EXPORT_H_