Add a size estimation mechanism to StoragePartitionHttpCacheDataRemover.

net/disk_cache/blockfile/in_flight_backend_io.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/in_flight_backend_io.h"
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
@@ skipping 97 matching lines @@
   operation_ = OP_DOOM_BETWEEN;
   initial_time_ = initial_time;
   end_time_ = end_time;
 }
 
 void BackendIO::DoomEntriesSince(const base::Time initial_time) {
   operation_ = OP_DOOM_SINCE;
   initial_time_ = initial_time;
 }
 
+void BackendIO::CalculateSizeOfAllEntries() {
+  operation_ = OP_SIZE_ALL;
+}
+
 void BackendIO::OpenNextEntry(Rankings::Iterator* iterator,
                               Entry** next_entry) {
   operation_ = OP_OPEN_NEXT;
   iterator_ = iterator;
   entry_ptr_ = next_entry;
 }
 
 void BackendIO::EndEnumeration(scoped_ptr<Rankings::Iterator> iterator) {
   operation_ = OP_END_ENUMERATION;
   scoped_iterator_ = iterator.Pass();
@@ skipping 109 matching lines @@
       break;
     case OP_DOOM_ALL:
       result_ = backend_->SyncDoomAllEntries();
       break;
     case OP_DOOM_BETWEEN:
       result_ = backend_->SyncDoomEntriesBetween(initial_time_, end_time_);
       break;
     case OP_DOOM_SINCE:
       result_ = backend_->SyncDoomEntriesSince(initial_time_);
       break;
+    case OP_SIZE_ALL:
+      result_ = backend_->SyncCalculateSizeOfAllEntries();
+      break;
     case OP_OPEN_NEXT:
       result_ = backend_->SyncOpenNextEntry(iterator_, entry_ptr_);
       break;
     case OP_END_ENUMERATION:
       backend_->SyncEndEnumeration(scoped_iterator_.Pass());
       result_ = net::OK;
       break;
     case OP_ON_EXTERNAL_CACHE_HIT:
       backend_->SyncOnExternalCacheHit(key_);
       result_ = net::OK;
@@ skipping 111 matching lines @@
 }
 
 void InFlightBackendIO::DoomEntriesBetween(const base::Time initial_time,
                         const base::Time end_time,
                         const net::CompletionCallback& callback) {
   scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
   operation->DoomEntriesBetween(initial_time, end_time);
   PostOperation(operation.get());
 }
 
+void InFlightBackendIO::CalculateSizeOfAllEntries(
+    const net::CompletionCallback& callback) {
+  scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
+  operation->CalculateSizeOfAllEntries();
+  PostOperation(operation.get());
+}
+
 void InFlightBackendIO::DoomEntriesSince(
     const base::Time initial_time, const net::CompletionCallback& callback) {
   scoped_refptr<BackendIO> operation(new BackendIO(this, backend_, callback));
   operation->DoomEntriesSince(initial_time);
   PostOperation(operation.get());
 }
 
 void InFlightBackendIO::OpenNextEntry(Rankings::Iterator* iterator,
                                       Entry** next_entry,
                                       const net::CompletionCallback& callback) {
@@ skipping 116 matching lines @@
   background_thread_->PostTask(
       FROM_HERE, base::Bind(&BackendIO::ExecuteOperation, operation));
   OnOperationPosted(operation);
 }
 
 base::WeakPtr<InFlightBackendIO> InFlightBackendIO::GetWeakPtr() {
   return ptr_factory_.GetWeakPtr();
 }
 
 }  // namespace