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

extensions/browser/api/web_request/upload_data_presenter.cc

 // Copyright (c) 2012 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 "extensions/browser/api/web_request/upload_data_presenter.h"
 
 #include <utility>
 
 #include "base/files/file_path.h"
 #include "base/strings/string_util.h"
@@ skipping 107 matching lines @@
     return;
   }
   if (!parser_->SetSource(base::StringPiece(bytes_reader->bytes(),
                                             bytes_reader->length()))) {
     Abort();
     return;
   }
 
   FormDataParser::Result result;
   while (parser_->GetNextNameValue(&result)) {
-    GetOrCreateList(dictionary_.get(), result.name())->Append(
-        new base::StringValue(result.value()));
+    GetOrCreateList(dictionary_.get(), result.name())
+        ->AppendString(result.value());
   }
 }
 
 bool ParsedDataPresenter::Succeeded() {
   if (success_ && !parser_->AllDataReadOK())
     Abort();
   return success_;
 }
 
 std::unique_ptr<base::Value> ParsedDataPresenter::Result() {
@@ skipping 16 matching lines @@
     dictionary_(success_ ? new base::DictionaryValue() : NULL) {
 }
 
 void ParsedDataPresenter::Abort() {
   success_ = false;
   dictionary_.reset();
   parser_.reset();
 }
 
 }  // namespace extensions