Add a size estimation mechanism to StoragePartitionHttpCacheDataRemover.

net/disk_cache/disk_cache_test_base.cc

Index: net/disk_cache/disk_cache_test_base.cc
diff --git a/net/disk_cache/disk_cache_test_base.cc b/net/disk_cache/disk_cache_test_base.cc
index 2e9bd7f1abfae47d9e5de47eeb45da7a72c8a8e6..345793baabf0b6b74a73d3caccf83a9bb478bb75 100644
--- a/net/disk_cache/disk_cache_test_base.cc
+++ b/net/disk_cache/disk_cache_test_base.cc
@@ -167,6 +167,12 @@ int DiskCacheTestWithCache::DoomEntriesSince(const base::Time initial_time) {
   return cb.GetResult(rv);
 }
 
+int DiskCacheTestWithCache::CalculateSizeOfAllEntries() {
+  net::TestCompletionCallback cb;
+  int rv = cache_->CalculateSizeOfAllEntries(cb.callback());
+  return cb.GetResult(rv);
+}
+
 scoped_ptr<DiskCacheTestWithCache::TestIterator>
     DiskCacheTestWithCache::CreateIterator() {
   return scoped_ptr<TestIterator>(new TestIterator(cache_->CreateIterator()));