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

third_party/WebKit/Source/core/css/resolver/StyleResolver.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc.
  * All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
@@ skipping 1177 matching lines @@
     const ActiveInterpolationsMap& activeInterpolationsMap) {
   // TODO(alancutter): Don't apply presentation attribute animations here,
   // they should instead apply in
   // SVGElement::collectStyleForPresentationAttribute().
   for (const auto& entry : activeInterpolationsMap) {
     CSSPropertyID property = entry.key.isCSSProperty()
                                  ? entry.key.cssProperty()
                                  : entry.key.presentationAttribute();
     if (!CSSPropertyPriorityData<priority>::propertyHasPriority(property))
       continue;
-    const Interpolation& interpolation = *entry.value.first();
+    const Interpolation& interpolation = *entry.value.front();
     if (interpolation.isInvalidatableInterpolation()) {
       InterpolationEnvironment environment(state);
       InvalidatableInterpolation::applyStack(entry.value, environment);
     } else {
       // TODO(alancutter): Remove this old code path once animations have
       // completely migrated to InterpolationTypes.
       toStyleInterpolation(interpolation).apply(state);
     }
   }
 }
@@ skipping 636 matching lines @@
 DEFINE_TRACE(StyleResolver) {
   visitor->trace(m_matchedPropertiesCache);
   visitor->trace(m_selectorFilter);
   visitor->trace(m_styleSharingLists);
   visitor->trace(m_pendingStyleSheets);
   visitor->trace(m_document);
   visitor->trace(m_tracker);
 }
 
 }  // namespace blink