[Sync] Convert sync to a static library.

components/sync/syncable/parent_child_index.h

 // 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 COMPONENTS_SYNC_SYNCABLE_PARENT_CHILD_INDEX_H_
 #define COMPONENTS_SYNC_SYNCABLE_PARENT_CHILD_INDEX_H_
 
 #include <map>
 #include <memory>
 #include <set>
 #include <vector>
 
 #include "base/macros.h"
 #include "components/sync/base/model_type.h"
-#include "components/sync/base/sync_export.h"
 #include "components/sync/syncable/syncable_id.h"
 
 namespace syncer {
 namespace syncable {
 
 struct EntryKernel;
 class ParentChildIndex;
 
 // A node ordering function.
-struct SYNC_EXPORT ChildComparator {
+struct ChildComparator {
   bool operator()(const EntryKernel* a, const EntryKernel* b) const;
 };
 
 // An ordered set of nodes.
 typedef std::set<EntryKernel*, ChildComparator> OrderedChildSet;
 typedef std::shared_ptr<OrderedChildSet> OrderedChildSetRef;
 
 // Container that tracks parent-child relationships.
 // Provides fast lookup of all items under a given parent.
-class SYNC_EXPORT ParentChildIndex {
+class ParentChildIndex {
  public:
   ParentChildIndex();
   ~ParentChildIndex();
 
   // Returns whether or not this entry belongs in the index.
   // True for all non-deleted, non-root entries.
   static bool ShouldInclude(const EntryKernel* e);
 
   // Inserts a given child into the index.
   bool Insert(EntryKernel* e);
@@ skipping 50 matching lines @@
   // with implicit parent.
   TypeRootChildSets type_root_child_sets_;
 
   DISALLOW_COPY_AND_ASSIGN(ParentChildIndex);
 };
 
 }  // namespace syncable
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_SYNCABLE_PARENT_CHILD_INDEX_H_