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

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

 // 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.
 
 #include "core/css/cssom/CSSUnparsedValue.h"
 
 #include "core/css/cssom/CSSStyleVariableReferenceValue.h"
 #include "core/css/parser/CSSTokenizer.h"
 #include "wtf/text/StringBuilder.h"
 
@@ skipping 47 matching lines @@
       variableReference);
 }
 
 HeapVector<StringOrCSSVariableReferenceValue> parserTokenRangeToFragments(
     CSSParserTokenRange range) {
   HeapVector<StringOrCSSVariableReferenceValue> fragments;
   StringBuilder builder;
   while (!range.atEnd()) {
     if (range.peek().functionId() == CSSValueVar) {
       if (!builder.isEmpty()) {
-        fragments.append(
+        fragments.push_back(
             StringOrCSSVariableReferenceValue::fromString(builder.toString()));
         builder.clear();
       }
       CSSParserTokenRange block = range.consumeBlock();
       StringView variableName = findVariableName(block);
       block.consumeWhitespace();
       if (block.peek().type() == CSSParserTokenType::CommaToken)
         block.consume();
-      fragments.append(variableReferenceValue(
+      fragments.push_back(variableReferenceValue(
           variableName, parserTokenRangeToFragments(block)));
     } else {
       range.consume().serialize(builder);
     }
   }
   if (!builder.isEmpty()) {
-    fragments.append(
+    fragments.push_back(
         StringOrCSSVariableReferenceValue::fromString(builder.toString()));
   }
   return fragments;
 }
 
 }  // namespace
 
 ValueIterable<StringOrCSSVariableReferenceValue>::IterationSource*
 CSSUnparsedValue::startIteration(ScriptState*, ExceptionState&) {
   return new UnparsedValueIterationSource(this);
@@ skipping 22 matching lines @@
     }
   }
 
   CSSTokenizer tokenizer(tokens.toString());
   return CSSVariableReferenceValue::create(CSSVariableData::create(
       tokenizer.tokenRange(), false /* isAnimationTainted */,
       true /* needsVariableResolution */));
 }
 
 }  // namespace blink