Add a size estimation mechanism to StoragePartitionHttpCacheDataRemover.

net/disk_cache/blockfile/backend_impl_v3.cc

Index: net/disk_cache/blockfile/backend_impl_v3.cc
diff --git a/net/disk_cache/blockfile/backend_impl_v3.cc b/net/disk_cache/blockfile/backend_impl_v3.cc
index 36402510c9ed0d6d4bf2a54e767d859f1b3276cc..283cf78d1b8c03267600744ae805a4d121aba7a1 100644
--- a/net/disk_cache/blockfile/backend_impl_v3.cc
+++ b/net/disk_cache/blockfile/backend_impl_v3.cc
@@ -661,6 +661,13 @@ int BackendImplV3::DoomEntriesSince(base::Time initial_time,
   }
 }
 
+int BackendImplV3::DoomEntriesBetween(base::Time initial_time,
+                                      base::Time end_time,
+                                      const CompletionCallback& callback) {
+  // TODO(msramek): Implement.
+  return net::ERR_NOT_IMPLEMENTED;
+}
+
 class BackendImplV3::IteratorImpl : public Backend::Iterator {
  public:
   explicit IteratorImpl(base::WeakPtr<InFlightBackendIO> background_queue)
@@ -1508,6 +1515,12 @@ int BackendImplV3::DoomEntriesSince(base::Time initial_time,
   return net::ERR_FAILED;
 }
 
+int BackendImplV3::CalculateSizeOfEntriesBetween(
+    base::Time initial_time,
+    base::Time end_time,
+    const CompletionCallback& callback) {
+  return net::ERR_FAILED;
+}
 
 class BackendImplV3::NotImplementedIterator : public Backend::Iterator {
  public: