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diff --git a/chrome/browser/sync/engine/conflict_resolution_view.h b/chrome/browser/sync/engine/conflict_resolution_view.h
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+// Copyright (c) 2009 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.
+//
+// Conflict resolution view is intended to provide a restricted
+// view of the sync cycle state for the conflict resolver. Since the
+// resolver doesn't get to see all of the SyncProcess, we can allow
+// it to operate on a subsection of the data.
+
+#ifndef CHROME_BROWSER_SYNC_ENGINE_CONFLICT_RESOLUTION_VIEW_H_
+#define CHROME_BROWSER_SYNC_ENGINE_CONFLICT_RESOLUTION_VIEW_H_
+
+#include <map>
+#include <set>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "chrome/browser/sync/engine/syncer_types.h"
+
+namespace syncable {
+class Id;
+}
+
+namespace browser_sync {
+
+class SyncCycleState;
+class SyncProcessState;
+class SyncerSession;
+
+class ConflictResolutionView {
+  // THIS CLASS PROVIDES NO SYNCHRONIZATION GUARANTEES.
+ public:
+
+  explicit ConflictResolutionView(SyncProcessState* state)
+      : process_state_(state) {
+  }
+
+  explicit ConflictResolutionView(SyncerSession* session);
+
+  ~ConflictResolutionView() {}
+
+  int conflicting_updates() const;
+
+  // TODO(sync) can successful commit go in session?
+  int successful_commits() const;
+
+  void increment_successful_commits();
+
+  void zero_successful_commits();
+
+  int conflicting_commits() const;
+
+  void set_conflicting_commits(const int val);
+
+  int num_sync_cycles() const;
+
+  void increment_num_sync_cycles();
+
+  void zero_num_sync_cycles();
+
+  // True iff we're stuck. Something has gone wrong with the syncer.
+  bool syncer_stuck() const;
+
+  void set_syncer_stuck(const bool val);
+
+  int64 current_sync_timestamp() const;
+
+  int64 servers_latest_timestamp() const;
+
+  IdToConflictSetMap::const_iterator IdToConflictSetFind(
+      const syncable::Id& the_id) const;
+
+  IdToConflictSetMap::const_iterator IdToConflictSetBegin() const;
+
+  IdToConflictSetMap::const_iterator IdToConflictSetEnd() const;
+
+  IdToConflictSetMap::size_type IdToConflictSetSize() const;
+
+  const ConflictSet* IdToConflictSetGet(const syncable::Id& the_id);
+
+  std::set<ConflictSet*>::const_iterator ConflictSetsBegin() const;
+
+  std::set<ConflictSet*>::const_iterator ConflictSetsEnd() const;
+
+  std::set<ConflictSet*>::size_type ConflictSetsSize() const;
+
+  void MergeSets(const syncable::Id& set1, const syncable::Id& set2);
+
+  void CleanupSets();
+
+  bool HasCommitConflicts() const;
+
+  bool HasBlockedItems() const;
+
+  int CommitConflictsSize() const;
+
+  int BlockedItemsSize() const;
+
+  void AddCommitConflict(const syncable::Id& the_id);
+
+  void AddBlockedItem(const syncable::Id& the_id);
+
+  void EraseCommitConflict(std::set<syncable::Id>::iterator it);
+
+  void EraseBlockedItem(std::set<syncable::Id>::iterator it);
+
+  std::set<syncable::Id>::iterator CommitConflictsBegin() const;
+
+  std::set<syncable::Id>::iterator BlockedItemsBegin() const;
+
+  std::set<syncable::Id>::iterator CommitConflictsEnd() const;
+
+  std::set<syncable::Id>::iterator BlockedItemsEnd() const;
+
+ private:
+  SyncProcessState* process_state_;
+
+  DISALLOW_COPY_AND_ASSIGN(ConflictResolutionView);
+};
+
+}  // namespace browser_sync
+
+#endif  // CHROME_BROWSER_SYNC_ENGINE_CONFLICT_RESOLUTION_VIEW_H_