WTF/std normalization: replace WTF::Vector::first() with ::front()

third_party/WebKit/Source/core/animation/KeyframeEffectModel.cpp

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 129 matching lines @@
     result.append(keyframe->clone());
   }
 
   if (result.isEmpty())
     return result;
 
   if (isNull(result.back()->offset()))
     result.back()->setOffset(1);
 
   if (result.size() > 1 && isNull(result[0]->offset()))
-    result.first()->setOffset(0);
+    result.front()->setOffset(0);
 
   size_t lastIndex = 0;
-  lastOffset = result.first()->offset();
+  lastOffset = result.front()->offset();
   for (size_t i = 1; i < result.size(); ++i) {
     double offset = result[i]->offset();
     if (!isNull(offset)) {
       for (size_t j = 1; j < i - lastIndex; ++j)
         result[lastIndex + j]->setOffset(
             lastOffset + (offset - lastOffset) * j / (i - lastIndex));
       lastIndex = i;
       lastOffset = offset;
     }
   }
@@ skipping 130 matching lines @@
   DCHECK_GE(m_keyframes.size(), 2U);
 }
 
 bool KeyframeEffectModelBase::PropertySpecificKeyframeGroup::
     addSyntheticKeyframeIfRequired(
         PassRefPtr<TimingFunction> zeroOffsetEasing) {
   DCHECK(!m_keyframes.isEmpty());
 
   bool addedSyntheticKeyframe = false;
 
-  if (m_keyframes.first()->offset() != 0.0) {
-    m_keyframes.insert(0, m_keyframes.first()->neutralKeyframe(
+  if (m_keyframes.front()->offset() != 0.0) {
+    m_keyframes.insert(0, m_keyframes.front()->neutralKeyframe(
                               0, std::move(zeroOffsetEasing)));
     addedSyntheticKeyframe = true;
   }
   if (m_keyframes.back()->offset() != 1.0) {
     appendKeyframe(m_keyframes.back()->neutralKeyframe(1, nullptr));
     addedSyntheticKeyframe = true;
   }
 
   return addedSyntheticKeyframe;
 }
 
 }  // namespace blink