Store attachment crc in AttachmentStore

sync/api/attachments/attachment_unittest.cc

 // Copyright 2014 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.
 
 #include "sync/api/attachments/attachment.h"
 
 #include <string>
 
 #include "base/memory/ref_counted.h"
 #include "base/memory/ref_counted_memory.h"
+#include "sync/internal_api/public/attachments/attachment_util.h"
 #include "sync/protocol/sync.pb.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace syncer {
 
 namespace {
 
 const char kAttachmentData[] = "some data";
 
 }  // namespace
 
 class AttachmentTest : public testing::Test {};
 
 TEST_F(AttachmentTest, Create_UniqueIdIsUnique) {
   scoped_refptr<base::RefCountedString> some_data(new base::RefCountedString);
   some_data->data() = kAttachmentData;
-  Attachment a1 = Attachment::Create(some_data);
-  Attachment a2 = Attachment::Create(some_data);
+  Attachment a1 = Attachment::CreateNew(some_data);
+  Attachment a2 = Attachment::CreateNew(some_data);
   EXPECT_NE(a1.GetId(), a2.GetId());
   EXPECT_EQ(a1.GetData(), a2.GetData());
 }
 
 TEST_F(AttachmentTest, Create_WithEmptyData) {
   scoped_refptr<base::RefCountedString> empty_data(new base::RefCountedString);
-  Attachment a = Attachment::Create(empty_data);
+  Attachment a = Attachment::CreateNew(empty_data);
   EXPECT_EQ(empty_data, a.GetData());
 }
 
-TEST_F(AttachmentTest, CreateWithId_HappyCase) {
+TEST_F(AttachmentTest, RestoreExisting_HappyCase) {
   AttachmentId id = AttachmentId::Create();
   scoped_refptr<base::RefCountedString> some_data(new base::RefCountedString);
   some_data->data() = kAttachmentData;
-  Attachment a = Attachment::CreateWithId(id, some_data);
+  uint32_t crc = ComputeCrc32c(some_data);
+  Attachment a = Attachment::RestoreExisting(id, some_data, crc);
   EXPECT_EQ(id, a.GetId());
   EXPECT_EQ(some_data, a.GetData());
 }
 
 }  // namespace syncer