[Sync] Convert sync to a static library.

components/sync/sessions/sync_session_snapshot.h

 // Copyright 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 COMPONENTS_SYNC_SESSIONS_SYNC_SESSION_SNAPSHOT_H_
 #define COMPONENTS_SYNC_SESSIONS_SYNC_SESSION_SNAPSHOT_H_
 
 #include <stddef.h>
 
 #include <string>
 #include <vector>
 
 #include "base/time/time.h"
 #include "components/sync/base/model_type.h"
 #include "components/sync/base/progress_marker_map.h"
-#include "components/sync/base/sync_export.h"
 #include "components/sync/sessions/model_neutral_state.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 namespace syncer {
 namespace sessions {
 
 // An immutable snapshot of state from a SyncSession.  Convenient to use as
 // part of notifications as it is inherently thread-safe.
 // TODO(zea): if copying this all over the place starts getting expensive,
 // consider passing around immutable references instead of values.
 // Default copy and assign welcome.
-class SYNC_EXPORT SyncSessionSnapshot {
+class SyncSessionSnapshot {
  public:
   SyncSessionSnapshot();
   SyncSessionSnapshot(
       const ModelNeutralState& model_neutral_state,
       const ProgressMarkerMap& download_progress_markers,
       bool is_silenced,
       int num_encryption_conflicts,
       int num_hierarchy_conflicts,
       int num_server_conflicts,
       bool notifications_enabled,
@@ skipping 47 matching lines @@
   // still some value in displaying it on the about:sync page.
   sync_pb::GetUpdatesCallerInfo::GetUpdatesSource legacy_updates_source_;
 
   bool is_initialized_;
 };
 
 }  // namespace sessions
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_SESSIONS_SYNC_SESSION_SNAPSHOT_H_