Revert of Refactor FakeAttachmentStore

sync/internal_api/attachments/attachment_service_impl_unittest.cc

Index: sync/internal_api/attachments/attachment_service_impl_unittest.cc
diff --git a/sync/internal_api/attachments/attachment_service_impl_unittest.cc b/sync/internal_api/attachments/attachment_service_impl_unittest.cc
index e802e2b6cf0308274bb4e739db35616af5f3bf47..85bbb6a9a8d2671919e06a1db6d80779ff64bc2c 100644
--- a/sync/internal_api/attachments/attachment_service_impl_unittest.cc
+++ b/sync/internal_api/attachments/attachment_service_impl_unittest.cc
@@ -15,8 +15,6 @@
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace syncer {
-
-namespace {
 
 class MockAttachmentStore : public AttachmentStore,
                             public base::SupportsWeakPtr<MockAttachmentStore> {
@@ -151,8 +149,6 @@
 
   DISALLOW_COPY_AND_ASSIGN(MockAttachmentUploader);
 };
-
-}  // namespace
 
 class AttachmentServiceImplTest : public testing::Test,
                                   public AttachmentService::Delegate {