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

chrome/browser/extensions/extension_gcm_app_handler_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/browser/extensions/extension_gcm_app_handler.h"
 
 #include <memory>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 271 matching lines @@
 
     waiter_.PumpUILoop();
   }
 
   // Returns a barebones test extension.
   scoped_refptr<Extension> CreateExtension() {
     base::DictionaryValue manifest;
     manifest.SetString(manifest_keys::kVersion, "1.0.0.0");
     manifest.SetString(manifest_keys::kName, kTestExtensionName);
     base::ListValue* permission_list = new base::ListValue;
-    permission_list->Append(new base::StringValue("gcm"));
+    permission_list->AppendString("gcm");
     manifest.Set(manifest_keys::kPermissions, permission_list);
 
     std::string error;
     scoped_refptr<Extension> extension = Extension::Create(
         temp_dir_.path(),
         Manifest::UNPACKED,
         manifest,
         Extension::NO_FLAGS,
         "ldnnhddmnhbkjipkidpdiheffobcpfmf",
         &error);
@@ skipping 185 matching lines @@
 
   // App handler is removed when the extension is updated to the version that
   // has GCM permission removed.
   UpdateExtension(extension.get(), "good2.crx");
   waiter()->PumpUILoop();
   EXPECT_TRUE(gcm_app_handler()->app_handler_count_drop_to_zero());
   EXPECT_FALSE(HasAppHandlers(extension->id()));
 }
 
 }  // namespace extensions