Change scoped_ptr to std::unique_ptr in //net/disk_cache.

net/disk_cache/blockfile/in_flight_backend_io.cc

Index: net/disk_cache/blockfile/in_flight_backend_io.cc
diff --git a/net/disk_cache/blockfile/in_flight_backend_io.cc b/net/disk_cache/blockfile/in_flight_backend_io.cc
index 307f7d2a8d09a2f35030929d055a1465e482b283..7cd3a0537a320c1788d269b27d0689934736c20d 100644
--- a/net/disk_cache/blockfile/in_flight_backend_io.cc
+++ b/net/disk_cache/blockfile/in_flight_backend_io.cc
@@ -128,7 +128,7 @@ void BackendIO::OpenNextEntry(Rankings::Iterator* iterator,
   entry_ptr_ = next_entry;
 }
 
-void BackendIO::EndEnumeration(scoped_ptr<Rankings::Iterator> iterator) {
+void BackendIO::EndEnumeration(std::unique_ptr<Rankings::Iterator> iterator) {
   operation_ = OP_END_ENUMERATION;
   scoped_iterator_ = std::move(iterator);
 }
@@ -413,7 +413,7 @@ void InFlightBackendIO::OpenNextEntry(Rankings::Iterator* iterator,
 }
 
 void InFlightBackendIO::EndEnumeration(
-    scoped_ptr<Rankings::Iterator> iterator) {
+    std::unique_ptr<Rankings::Iterator> iterator) {
   scoped_refptr<BackendIO> operation(
       new BackendIO(this, backend_, net::CompletionCallback()));
   operation->EndEnumeration(std::move(iterator));