Remove raw DictionaryValue::Set in //chrome

chrome/common/extensions/manifest_tests/extension_manifests_platformapp_unittest.cc

Index: chrome/common/extensions/manifest_tests/extension_manifests_platformapp_unittest.cc
diff --git a/chrome/common/extensions/manifest_tests/extension_manifests_platformapp_unittest.cc b/chrome/common/extensions/manifest_tests/extension_manifests_platformapp_unittest.cc
index 53ab8623c0db4f2431266261af39aed566c8fb57..06ccafb23bde94c987b47ce42b9374090af4e97d 100644
--- a/chrome/common/extensions/manifest_tests/extension_manifests_platformapp_unittest.cc
+++ b/chrome/common/extensions/manifest_tests/extension_manifests_platformapp_unittest.cc
@@ -124,13 +124,12 @@ TEST_F(PlatformAppsManifestTest, CertainApisRequirePlatformApps) {
   std::vector<std::unique_ptr<ManifestData>> manifests;
   // Create each manifest.
   for (const char* api_name : kPlatformAppExperimentalApis) {
-    // DictionaryValue will take ownership of this ListValue.
-    base::ListValue *permissions = new base::ListValue();
+    auto permissions = base::MakeUnique<base::ListValue>();
     permissions->AppendString("experimental");
     permissions->AppendString(api_name);
-    manifest->Set("permissions", permissions);
-    manifests.push_back(
-        base::MakeUnique<ManifestData>(manifest->CreateDeepCopy(), ""));
+    manifest->Set("permissions", std::move(permissions));
+    manifests.push_back(base::MakeUnique<ManifestData>(
+        base::MakeUnique<base::DictionaryValue>(*manifest), ""));
   }
   // First try to load without any flags. This should warn for every API.
   for (const std::unique_ptr<ManifestData>& manifest : manifests) {