[Sync] Rename csync namespace to syncer

sync/engine/conflict_resolver.h

Index: sync/engine/conflict_resolver.h
diff --git a/sync/engine/conflict_resolver.h b/sync/engine/conflict_resolver.h
index fedaa45804ca03521bc4bdb44a687a1d5c666e78..733348ce9a3310b03855afa4a315969344240991 100644
--- a/sync/engine/conflict_resolver.h
+++ b/sync/engine/conflict_resolver.h
@@ -24,7 +24,7 @@ class MutableEntry;
 class WriteTransaction;
 }  // namespace syncable
 
-namespace csync {
+namespace syncer {
 
 class Cryptographer;
 
@@ -84,6 +84,6 @@ class ConflictResolver {
   DISALLOW_COPY_AND_ASSIGN(ConflictResolver);
 };
 
-}  // namespace csync
+}  // namespace syncer
 
 #endif  // SYNC_ENGINE_CONFLICT_RESOLVER_H_