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

third_party/WebKit/Source/core/paint/ObjectPainter.cpp

 // Copyright 2014 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/paint/ObjectPainter.h"
 
 #include "core/layout/LayoutBlock.h"
 #include "core/layout/LayoutInline.h"
 #include "core/layout/LayoutObject.h"
 #include "core/layout/LayoutTheme.h"
@@ skipping 156 matching lines @@
 
   Color outlineColor = color;
   bool useTransparencyLayer = color.hasAlpha();
   if (useTransparencyLayer) {
     graphicsContext.beginLayer(static_cast<float>(color.alpha()) / 255);
     outlineColor =
         Color(outlineColor.red(), outlineColor.green(), outlineColor.blue());
   }
 
   DCHECK(count >= 4 && edges.size() == count);
-  int firstAdjacentWidth = adjustJoint(width, edges.back(), edges.first());
+  int firstAdjacentWidth = adjustJoint(width, edges.back(), edges.front());
 
   // The width of the angled part of starting and ending joint of the current
   // edge.
   int adjacentWidthStart = firstAdjacentWidth;
   int adjacentWidthEnd;
   for (size_t i = 0; i < count; ++i) {
     OutlineEdgeInfo& edge = edges[i];
     adjacentWidthEnd = i == count - 1 ? firstAdjacentWidth
                                       : adjustJoint(width, edge, edges[i + 1]);
     int adjacentWidth1 = adjacentWidthStart;
@@ skipping 530 matching lines @@
     adjustedPaintOffset += toLayoutBox(m_layoutObject).location();
   DCHECK(m_layoutObject.previousPaintOffset() == adjustedPaintOffset)
       << " Paint offset mismatch: " << m_layoutObject.debugName()
       << " from PaintPropertyTreeBuilder: "
       << m_layoutObject.previousPaintOffset().toString()
       << " from painter: " << adjustedPaintOffset.toString();
 }
 #endif
 
 }  // namespace blink