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

net/disk_cache/blockfile/backend_impl.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 "net/disk_cache/blockfile/backend_impl.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/file_util.h"
 #include "base/files/file_path.h"
@@ skipping 804 matching lines @@
 
 void BackendImpl::OnEntryDestroyBegin(Addr address) {
   EntriesMap::iterator it = open_entries_.find(address.value());
   if (it != open_entries_.end())
     open_entries_.erase(it);
 }
 
 void BackendImpl::OnEntryDestroyEnd() {
   DecreaseNumRefs();
   if (data_->header.num_bytes > max_size_ && !read_only_ &&
-      (up_ticks_ > kTrimDelay || user_flags_ & kNoRandom))
+      (up_ticks_ > kTrimDelay || user_flags_ & kNoRandom)) {
     eviction_.TrimCache(false);
+  }
 }
 
 EntryImpl* BackendImpl::GetOpenEntry(CacheRankingsBlock* rankings) const {
   DCHECK(rankings->HasData());
   EntriesMap::const_iterator it =
       open_entries_.find(rankings->Data()->contents);
   if (it != open_entries_.end()) {
     // We have this entry in memory.
     return it->second;
   }
@@ skipping 1255 matching lines @@
     if (total_memory > kMaxBuffersSize || total_memory <= 0)
       total_memory = kMaxBuffersSize;
 
     done = true;
   }
 
   return static_cast<int>(total_memory);
 }
 
 }  // namespace disk_cache