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

third_party/WebKit/Source/core/css/cssom/ComputedStylePropertyMap.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/ComputedStylePropertyMap.h"
 
 #include "core/css/CSSComputedStyleDeclaration.h"
 #include "core/css/cssom/StyleValueFactory.h"
 
 namespace blink {
@@ skipping 14 matching lines @@
           customPropertyName);
   if (!cssValue)
     return CSSStyleValueVector();
   return StyleValueFactory::cssValueToStyleValueVector(CSSPropertyInvalid,
                                                        *cssValue);
 }
 
 Vector<String> ComputedStylePropertyMap::getProperties() {
   Vector<String> result;
   for (unsigned i = 0; i < m_computedStyleDeclaration->length(); i++) {
-    result.append(m_computedStyleDeclaration->item(i));
+    result.push_back(m_computedStyleDeclaration->item(i));
   }
   return result;
 }
 
 }  // namespace blink