[BlobStorage] BlobMemoryController & tests

This is a split off of https://codereview.chromium.org/2055053003/.

This adds the BlobMemoryController & tests, as well as any other small
required changes. I avoided doing too much refactoring (like the move
to BlobStatus everywhere, and removing BlobStorageRegistry::Entry for
InternalBlobData) to just focus on the BlobMemoryController API.

BUG=375297
R=michaeln@chromium.org,kinuko@chromium.org,mek@chromium.org

Review-Url: https://chromiumcodereview.appspot.com/2339933004
Cr-Commit-Position: refs/heads/master@{#426901}

content/browser/blob_storage/blob_async_transport_request_builder_unittest.cc

@@ -15,8 +15,6 @@ namespace storage {
 namespace {
 
 const char kNewUUID[] = "newUUID";
-const base::FilePath kFuturePopulatingFilePath = base::FilePath::FromUTF8Unsafe(
-    std::string(BlobDataBuilder::kAppendFutureFileTemporaryFileName));
 const char kFakeBlobUUID[] = "fakeBlob";
 
 void AddMemoryItem(size_t length, std::vector<DataElement>* out) {
@@ -87,8 +85,7 @@ TEST(BlobAsyncTransportRequestBuilderTest, TestLargeBlockToFile) {
       memory_item_request.message);
 
   BlobDataBuilder expected_builder(kNewUUID);
-  expected_builder.AppendFile(kFuturePopulatingFilePath, 0, 305,
-                              base::Time::FromDoubleT(0));
+  expected_builder.AppendFutureFile(0, 305, 0);
   EXPECT_EQ(expected_builder, builder);
 }
 
@@ -131,12 +128,9 @@ TEST(BlobAsyncTransportRequestBuilderTest, TestLargeBlockToFiles) {
       memory_item_request.message);
 
   BlobDataBuilder expected_builder(kNewUUID);
-  expected_builder.AppendFile(kFuturePopulatingFilePath, 0, 400,
-                              base::Time::FromDoubleT(0));
-  expected_builder.AppendFile(kFuturePopulatingFilePath, 0, 400,
-                              base::Time::FromDoubleT(0));
-  expected_builder.AppendFile(kFuturePopulatingFilePath, 0, 200,
-                              base::Time::FromDoubleT(0));
+  expected_builder.AppendFutureFile(0, 400, 0);
+  expected_builder.AppendFutureFile(0, 400, 1);
+  expected_builder.AppendFutureFile(0, 200, 2);
   EXPECT_EQ(expected_builder, builder);
 }
 

content/browser/blob_storage/blob_data_builder_unittest.cc

@@ -0,0 +1,31 @@
+// Copyright 2016 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 "storage/browser/blob/blob_data_builder.h"
+
+#include <string>
+
+#include "base/logging.h"
+#include "storage/common/data_element.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace storage {
+
+TEST(BlobDataBuilderTest, TestFutureFiles) {
+  const std::string kId = "id";
+
+  DataElement element;
+  element.SetToFilePath(BlobDataBuilder::GetFutureFileItemPath(0));
+  EXPECT_TRUE(BlobDataBuilder::IsFutureFileItem(element));
+  EXPECT_EQ(0ull, BlobDataBuilder::GetFutureFileID(element));
+
+  BlobDataBuilder builder(kId);
+  builder.AppendFutureFile(0, 10, 0);
+  EXPECT_TRUE(
+      BlobDataBuilder::IsFutureFileItem(builder.items_[0]->data_element()));
+  EXPECT_EQ(0ull, BlobDataBuilder::GetFutureFileID(
+                      builder.items_[0]->data_element()));
+}
+
+}  // namespace storage