Remove the flash specific disk cache backend.

net/disk_cache/flash/storage_unittest.cc

-// Copyright (c) 2012 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 "base/files/file_path.h"
-#include "base/files/scoped_temp_dir.h"
-#include "net/base/io_buffer.h"
-#include "net/disk_cache/disk_cache_test_util.h"
-#include "net/disk_cache/flash/flash_cache_test_base.h"
-#include "net/disk_cache/flash/storage.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-namespace {
-
-const int32 kSizes[]   = {512, 1024, 4096, 133, 1333, 13333};
-const int32 kOffsets[] = {0,   1,    3333, 125, 12443, 4431};
-
-}  // namespace
-
-TEST_F(FlashCacheTest, StorageReadWrite) {
-  disk_cache::Storage storage(path_, kStorageSize);
-  EXPECT_TRUE(storage.Init());
-
-  for (size_t i = 0; i < arraysize(kOffsets); ++i) {
-    int32 size = kSizes[i];
-    int32 offset = kOffsets[i];
-
-    scoped_refptr<net::IOBuffer> write_buffer(new net::IOBuffer(size));
-    scoped_refptr<net::IOBuffer> read_buffer(new net::IOBuffer(size));
-
-    CacheTestFillBuffer(write_buffer->data(), size, false);
-
-    bool rv = storage.Write(write_buffer->data(), size, offset);
-    EXPECT_TRUE(rv);
-
-    rv = storage.Read(read_buffer->data(), size, offset);
-    EXPECT_TRUE(rv);
-
-    EXPECT_EQ(0, memcmp(read_buffer->data(), write_buffer->data(), size));
-  }
-}