**STILLBAKING** Decouple disk cache tests from backends.

net/disk_cache/disk_cache_test_util.cc

 // Copyright (c) 2011 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 "net/disk_cache/disk_cache_test_util.h"
 
 #include "base/files/file_path.h"
 #include "base/logging.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/path_service.h"
@@ skipping 28 matching lines @@
   }
   if (len && !buffer[0])
     buffer[0] = 'g';
 }
 
 bool CreateCacheTestFile(const base::FilePath& name) {
   int flags = base::PLATFORM_FILE_CREATE_ALWAYS |
               base::PLATFORM_FILE_READ |
               base::PLATFORM_FILE_WRITE;
 
-  scoped_refptr<disk_cache::File> file(new disk_cache::File(
-      base::CreatePlatformFile(name, flags, NULL, NULL)));
-  if (!file->IsValid())
+  base::PlatformFile file = base::CreatePlatformFile(name, flags, NULL, NULL);
+  if (file == base::kInvalidPlatformFileValue)
     return false;
 
-  file->SetLength(4 * 1024 * 1024);
+  base::TruncatePlatformFile(file, 4 * 1024 * 1024);
   return true;
 }
 
 bool DeleteCache(const base::FilePath& path) {
   disk_cache::DeleteCache(path, false);
   return true;
 }
 
-bool CheckCacheIntegrity(const base::FilePath& path, bool new_eviction,
-                         uint32 mask) {
-  scoped_ptr<disk_cache::BackendImpl> cache(new disk_cache::BackendImpl(
-      path, mask, base::MessageLoopProxy::current().get(), NULL));
-  if (!cache.get())
-    return false;
-  if (new_eviction)
-    cache->SetNewEviction();
-  cache->SetFlags(disk_cache::kNoRandom);
-  if (cache->SyncInit() != net::OK)
-    return false;
-  return cache->SelfCheck() >= 0;
-}
-
 // -----------------------------------------------------------------------
 
 MessageLoopHelper::MessageLoopHelper()
     : num_callbacks_(0),
       num_iterations_(0),
       last_(0),
       completed_(false),
       callback_reused_error_(false),
       callbacks_called_(0) {
 }
@@ skipping 50 matching lines @@
 
   if (reuse_) {
     DCHECK_EQ(1, reuse_);
     if (2 == reuse_)
       helper_->set_callback_reused_error(true);
     reuse_++;
   }
 
   helper_->CallbackWasCalled();
 }