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

chrome/browser/extensions/api/mdns/mdns_api_unittest.cc

Index: chrome/browser/extensions/api/mdns/mdns_api_unittest.cc
diff --git a/chrome/browser/extensions/api/mdns/mdns_api_unittest.cc b/chrome/browser/extensions/api/mdns/mdns_api_unittest.cc
index d10304486d0e4843f51f6f124f26f245438a5ad2..44b5cb69e44341789378212cb80ef57a1ce73e9a 100644
--- a/chrome/browser/extensions/api/mdns/mdns_api_unittest.cc
+++ b/chrome/browser/extensions/api/mdns/mdns_api_unittest.cc
@@ -245,7 +245,7 @@ class MDnsAPITest : public extensions::ExtensionServiceTestBase {
       // Setting app.background.page = "background.html" is sufficient to make
       // the extension type TYPE_PLATFORM_APP.
       manifest.Set(extensions::manifest_keys::kPlatformAppBackgroundPage,
-                   new base::Value("background.html"));
+                   base::MakeUnique<base::Value>("background.html"));
     }
 
     std::string error;