Update from https://crrev.com/303153

net/disk_cache/simple/simple_index_unittest.cc

 // Copyright (c) 2013 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 <algorithm>
 #include <functional>
 
 #include "base/files/scoped_temp_dir.h"
 #include "base/hash.h"
 #include "base/logging.h"
@@ skipping 50 matching lines @@
                         const base::Closure& callback,
                         SimpleIndexLoadResult* out_load_result) override {
     load_callback_ = callback;
     load_result_ = out_load_result;
     ++load_index_entries_calls_;
   }
 
   void WriteToDisk(const SimpleIndex::EntrySet& entry_set,
                    uint64 cache_size,
                    const base::TimeTicks& start,
-                   bool app_on_background) override {
+                   bool app_on_background,
+                   const base::Closure& callback) override {
     disk_writes_++;
     disk_write_entry_set_ = entry_set;
   }
 
   void GetAndResetDiskWriteEntrySet(SimpleIndex::EntrySet* entry_set) {
     entry_set->swap(disk_write_entry_set_);
   }
 
   const base::Closure& load_callback() const { return load_callback_; }
   SimpleIndexLoadResult* load_result() const { return load_result_; }
@@ skipping 536 matching lines @@
   WaitForTimeChange();
   EXPECT_EQ(expected_trigger, index()->write_to_disk_timer_.desired_run_time());
   index()->Insert(hashes_.at<2>());
   index()->UpdateEntrySize(hashes_.at<2>(), 40);
   EXPECT_TRUE(index()->write_to_disk_timer_.IsRunning());
   EXPECT_LT(expected_trigger, index()->write_to_disk_timer_.desired_run_time());
   index()->write_to_disk_timer_.Stop();
 }
 
 }  // namespace disk_cache