Add tests for the cache deletion in BrowsingDataRemover

components/browsing_data/storage_partition_http_cache_data_remover.cc

 // Copyright 2015 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 "components/browsing_data/storage_partition_http_cache_data_remover.h"
 
 #include "components/browsing_data/conditional_cache_deletion_helper.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/storage_partition.h"
 #include "net/base/sdch_manager.h"
@@ skipping 160 matching lines @@
       }
       case STATE_PROCESS_MAIN:
       case STATE_PROCESS_MEDIA: {
         next_cache_state_ = (next_cache_state_ == STATE_PROCESS_MAIN)
                                 ? STATE_CREATE_MEDIA
                                 : STATE_DONE;
 
         // |cache_| can be null if it cannot be initialized.
         if (cache_) {
           if (!url_predicate_.is_null()) {
-            (new ConditionalCacheDeletionHelper(
+            rv = (new ConditionalCacheDeletionHelper(
                 cache_,
                 ConditionalCacheDeletionHelper::CreateURLAndTimeCondition(
                     url_predicate_,
                     delete_begin_,
                     delete_end_)))->DeleteAndDestroySelfWhenFinished(
                         base::Bind(
                             &StoragePartitionHttpCacheDataRemover::DoClearCache,
                             base::Unretained(this)));
           } else if (delete_begin_.is_null() && delete_end_.is_max()) {
             rv = cache_->DoomAllEntries(base::Bind(
@@ skipping 106 matching lines @@
       default: {
         NOTREACHED() << "bad state";
         next_cache_state_ = STATE_NONE;  // Stop looping.
         return;
       }
     }
   }
 }
 
 }  // namespace browsing_data