Fix external snapshot compilation

src/snapshot-external.cc

 // Copyright 2006-2008 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Used for building with external snapshots.
 
 #include "src/snapshot.h"
 
 #include "src/serialize.h"
 #include "src/snapshot-source-sink.h"
@@ skipping 32 matching lines @@
 
 bool Snapshot::HaveASnapshotToStartFrom() {
   return snapshot_impl_ != NULL;
 }
 
 
 bool Snapshot::Initialize() {
   if (!HaveASnapshotToStartFrom())
     return false;
 
-  ElapsedTimer timer;
+  base::ElapsedTimer timer;
   if (FLAG_profile_deserialization) {
     timer.Start();
   }
   SnapshotByteSource source(snapshot_impl_->data, snapshot_impl_->size);
   Deserializer deserializer(&source);
   deserializer.set_reservation(NEW_SPACE, snapshot_impl_->new_space_used);
   deserializer.set_reservation(OLD_POINTER_SPACE,
                                snapshot_impl_->pointer_space_used);
   deserializer.set_reservation(OLD_DATA_SPACE,
                                snapshot_impl_->data_space_used);
@@ skipping 67 matching lines @@
   snapshot_impl_->context_data_space_used = source.GetInt();
   snapshot_impl_->context_code_space_used = source.GetInt();
   snapshot_impl_->context_map_space_used = source.GetInt();
   snapshot_impl_->context_cell_space_used = source.GetInt();
   snapshot_impl_->context_property_cell_space_used = source.GetInt();
 
   ASSERT(success);
 }
 
 } }  // namespace v8::internal