[Sync] Rename csync namespace to syncer

sync/syncable/syncable_mock.h

Index: sync/syncable/syncable_mock.h
diff --git a/sync/syncable/syncable_mock.h b/sync/syncable/syncable_mock.h
index a829ad248675f7f19bdfb2a02b67853048d68603..82eac1a8260e6481bebec4f5d4e8d3b01a2ddb87 100644
--- a/sync/syncable/syncable_mock.h
+++ b/sync/syncable/syncable_mock.h
@@ -20,7 +20,7 @@ using syncable::EntryKernel;
 
 class MockDirectory : public Directory {
  public:
-  explicit MockDirectory(csync::UnrecoverableErrorHandler* handler);
+  explicit MockDirectory(syncer::UnrecoverableErrorHandler* handler);
   virtual ~MockDirectory();
 
   MOCK_METHOD1(GetEntryByHandle, syncable::EntryKernel*(int64));
@@ -33,7 +33,7 @@ class MockDirectory : public Directory {
   MOCK_METHOD1(PurgeEntriesWithTypeIn, void(syncable::ModelTypeSet));
 
  private:
-  csync::FakeEncryptor encryptor_;
+  syncer::FakeEncryptor encryptor_;
   syncable::NullDirectoryChangeDelegate delegate_;
 };