Migrate WTF::Vector::append() to ::push_back() [part 3 of N]

third_party/WebKit/Source/core/css/cssom/CSSUnparsedValue.h

 // Copyright 2016 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.
 
 #ifndef CSSUnparsedValue_h
 #define CSSUnparsedValue_h
 
 #include "bindings/core/v8/Iterable.h"
 #include "bindings/core/v8/StringOrCSSVariableReferenceValue.h"
 #include "core/css/CSSVariableReferenceValue.h"
@@ skipping 32 matching lines @@
   }
 
  protected:
   CSSUnparsedValue(
       const HeapVector<StringOrCSSVariableReferenceValue>& fragments)
       : CSSStyleValue(), m_fragments(fragments) {}
 
  private:
   static CSSUnparsedValue* fromString(String string) {
     HeapVector<StringOrCSSVariableReferenceValue> fragments;
-    fragments.append(StringOrCSSVariableReferenceValue::fromString(string));
+    fragments.push_back(StringOrCSSVariableReferenceValue::fromString(string));
     return create(fragments);
   }
 
   IterationSource* startIteration(ScriptState*, ExceptionState&) override;
 
   FRIEND_TEST_ALL_PREFIXES(CSSUnparsedValueTest, ListOfStrings);
   FRIEND_TEST_ALL_PREFIXES(CSSUnparsedValueTest,
                            ListOfCSSVariableReferenceValues);
   FRIEND_TEST_ALL_PREFIXES(CSSUnparsedValueTest, MixedList);
   FRIEND_TEST_ALL_PREFIXES(CSSVariableReferenceValueTest, MixedList);
 
   HeapVector<StringOrCSSVariableReferenceValue> m_fragments;
 };
 
 }  // namespace blink
 
 #endif  // CSSUnparsedValue_h