Add a size estimation mechanism to StoragePartitionHttpCacheDataRemover.

net/http/mock_http_cache.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/http/mock_http_cache.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/thread_task_runner_handle.h"
@@ skipping 459 matching lines @@
                                       const base::Time end_time,
                                       const CompletionCallback& callback) {
   return ERR_NOT_IMPLEMENTED;
 }
 
 int MockDiskCache::DoomEntriesSince(const base::Time initial_time,
                                     const CompletionCallback& callback) {
   return ERR_NOT_IMPLEMENTED;
 }
 
+int MockDiskCache::CalculateSizeOfAllEntries(
+    const CompletionCallback& callback) {
+  return ERR_NOT_IMPLEMENTED;
+}
+
 class MockDiskCache::NotImplementedIterator : public Iterator {
  public:
   int OpenNextEntry(disk_cache::Entry** next_entry,
                     const CompletionCallback& callback) override {
     return ERR_NOT_IMPLEMENTED;
   }
 };
 
 scoped_ptr<disk_cache::Backend::Iterator> MockDiskCache::CreateIterator() {
   return scoped_ptr<Iterator>(new NotImplementedIterator());
@@ skipping 171 matching lines @@
   if (!callback_.is_null()) {
     if (!fail_)
       backend_->reset(new MockDiskCache());
     CompletionCallback cb = callback_;
     callback_.Reset();
     cb.Run(Result());  // This object can be deleted here.
   }
 }
 
 }  // namespace net