Stop passing raw pointers to base::Value API in c/b/chromeos and c/b/extensions

chrome/browser/extensions/api/sync_file_system/sync_file_system_api_helpers.h

Index: chrome/browser/extensions/api/sync_file_system/sync_file_system_api_helpers.h
diff --git a/chrome/browser/extensions/api/sync_file_system/sync_file_system_api_helpers.h b/chrome/browser/extensions/api/sync_file_system/sync_file_system_api_helpers.h
index 1d0feab2a2012b2277d7729600d9d5a5b5c00850..8c4ae9aea648d426f6057d6d583f3df0acd45cef 100644
--- a/chrome/browser/extensions/api/sync_file_system/sync_file_system_api_helpers.h
+++ b/chrome/browser/extensions/api/sync_file_system/sync_file_system_api_helpers.h
@@ -5,6 +5,8 @@
 #ifndef CHROME_BROWSER_EXTENSIONS_API_SYNC_FILE_SYSTEM_SYNC_FILE_SYSTEM_API_HELPERS_H_
 #define CHROME_BROWSER_EXTENSIONS_API_SYNC_FILE_SYSTEM_SYNC_FILE_SYSTEM_API_HELPERS_H_
 
+#include <memory>
+
 #include "chrome/browser/sync_file_system/conflict_resolution_policy.h"
 #include "chrome/browser/sync_file_system/sync_action.h"
 #include "chrome/browser/sync_file_system/sync_direction.h"
@@ -52,7 +54,7 @@ ExtensionEnumToConflictResolutionPolicy(
 // in the renderer's customer binding to create a FileEntry object.
 // This returns NULL if the given |url| is not valid or |file_type| is
 // SYNC_FILE_TYPE_UNKNOWN.
-base::DictionaryValue* CreateDictionaryValueForFileSystemEntry(
+std::unique_ptr<base::DictionaryValue> CreateDictionaryValueForFileSystemEntry(
     const storage::FileSystemURL& url,
     sync_file_system::SyncFileType file_type);