Make element removal methods in DictionaryValue and ListValue take scoped_ptr's as outparams.

base/debug/trace_event_unittest.cc

Index: base/debug/trace_event_unittest.cc
diff --git a/base/debug/trace_event_unittest.cc b/base/debug/trace_event_unittest.cc
index 5beea3715c76e2ee72e67ba067a4f515ff810586..ea295c05dba988947a8a10e8172adde9b199b133 100644
--- a/base/debug/trace_event_unittest.cc
+++ b/base/debug/trace_event_unittest.cc
@@ -149,9 +149,9 @@ void TraceEventTestFixture::OnTraceDataCollected(
 
   // Move items into our aggregate collection
   while (root_list->GetSize()) {
-    Value* item = NULL;
+    scoped_ptr<Value> item;
     root_list->Remove(0, &item);
-    trace_parsed_.Append(item);
+    trace_parsed_.Append(item.release());
   }
 }