[Sync] Move //components/sync to the syncer namespace.

components/sync/api/sync_change_processor.h

Index: components/sync/api/sync_change_processor.h
diff --git a/components/sync/api/sync_change_processor.h b/components/sync/api/sync_change_processor.h
index 2d31b8a98e47831e00804429c31caf7157144729..7d53c8e293b284783283581fd721092e6474be8e 100644
--- a/components/sync/api/sync_change_processor.h
+++ b/components/sync/api/sync_change_processor.h
@@ -73,10 +73,9 @@ class SyncChangeProcessor {
   // that can affect all SyncData sent to/from the server, much like a cookie.
   // TODO(zea): consider pulling the refresh logic into a separate method
   // unrelated to datatype implementations.
-  virtual syncer::SyncError UpdateDataTypeContext(
-      ModelType type,
-      ContextRefreshStatus refresh_status,
-      const std::string& context);
+  virtual SyncError UpdateDataTypeContext(ModelType type,
+                                          ContextRefreshStatus refresh_status,
+                                          const std::string& context);
 
   // Adds an observer of local sync changes. This observer is notified when
   // local sync changes are applied by GenericChangeProcessor. observer is