Remove ListValue::Append(new {Fundamental,String}Value(...)) pattern in //chrome

chrome/common/extensions/features/chrome_channel_feature_filter_unittest.cc

 // Copyright 2014 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.
 
 #include "chrome/common/extensions/features/chrome_channel_feature_filter.h"
 
 #include <memory>
 #include <string>
 #include <utility>
 
@@ skipping 121 matching lines @@
 TEST_F(ChromeChannelFeatureFilterTest, FeatureValidation) {
   std::unique_ptr<base::DictionaryValue> value(new base::DictionaryValue());
 
   base::DictionaryValue* feature1 = new base::DictionaryValue();
   feature1->SetString("channel", "trunk");
   value->Set("feature1", feature1);
 
   base::DictionaryValue* feature2 = new base::DictionaryValue();
   feature2->SetString("channel", "trunk");
   base::ListValue* extension_types = new base::ListValue();
-  extension_types->Append(new base::StringValue("extension"));
+  extension_types->AppendString("extension");
   feature2->Set("extension_types", extension_types);
   base::ListValue* contexts = new base::ListValue();
-  contexts->Append(new base::StringValue("blessed_extension"));
+  contexts->AppendString("blessed_extension");
   feature2->Set("contexts", contexts);
   value->Set("feature2", feature2);
 
   std::unique_ptr<BaseFeatureProvider> provider(
       new BaseFeatureProvider(*value, CreateFeature<PermissionFeature>));
 
   // feature1 won't validate because it lacks an extension type.
   EXPECT_FALSE(provider->GetFeature("feature1"));
 
   // If we add one, it works.
@@ skipping 137 matching lines @@
         Feature::IS_AVAILABLE,
         feature->IsAvailableToManifest("1",
                                        Manifest::TYPE_EXTENSION,
                                        Manifest::INVALID_LOCATION,
                                        Feature::UNSPECIFIED_PLATFORM,
                                        Feature::GetCurrentPlatform()).result());
   }
 }
 
 }  // namespace extensions