Switch //components away from base::ListValue::Append(Value*) overload.

components/sync/syncable/entry_kernel.h

 // Copyright 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_SYNC_SYNCABLE_ENTRY_KERNEL_H_
 #define COMPONENTS_SYNC_SYNCABLE_ENTRY_KERNEL_H_
 
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 382 matching lines @@
     EntryKernelSet;
 
 struct EntryKernelMutation {
   EntryKernel original, mutated;
 };
 
 typedef std::map<int64_t, EntryKernelMutation> EntryKernelMutationMap;
 
 typedef Immutable<EntryKernelMutationMap> ImmutableEntryKernelMutationMap;
 
-// Caller owns the return value.
-base::DictionaryValue* EntryKernelMutationToValue(
+std::unique_ptr<base::DictionaryValue> EntryKernelMutationToValue(
     const EntryKernelMutation& mutation);
 
-// Caller owns the return value.
-base::ListValue* EntryKernelMutationMapToValue(
+std::unique_ptr<base::ListValue> EntryKernelMutationMapToValue(
     const EntryKernelMutationMap& mutations);
 
 std::ostream& operator<<(std::ostream& os, const EntryKernel& entry_kernel);
 
 }  // namespace syncable
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_SYNCABLE_ENTRY_KERNEL_H_