Disk cache: Add a method to cancel pending sparse operations....

net/disk_cache/entry_impl.cc

Index: net/disk_cache/entry_impl.cc
===================================================================
--- net/disk_cache/entry_impl.cc	(revision 28049)
+++ net/disk_cache/entry_impl.cc	(working copy)
@@ -384,6 +384,20 @@
   return sparse_->GetAvailableRange(offset, len, start);
 }
 
+void EntryImpl::CancelSparseIO() {
+  if (!sparse_.get())
+    return;
+
+  sparse_->CancelIO();
+}
+
+int EntryImpl::ReadyForSparseIO(net::CompletionCallback* completion_callback) {
+  if (!sparse_.get())
+    return net::OK;
+
+  return sparse_->ReadyToUse(completion_callback);
+}
+
 // ------------------------------------------------------------------------
 
 uint32 EntryImpl::GetHash() {