WTF/std normalization: replace WTF::Vector::last with ::back

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

Index: third_party/WebKit/Source/core/paint/ObjectPainter.cpp
diff --git a/third_party/WebKit/Source/core/paint/ObjectPainter.cpp b/third_party/WebKit/Source/core/paint/ObjectPainter.cpp
index b2011d2eb5caf320f12a3904464a86aa0f5b8498..d51dbd3c0c76ac0868a6b0d4a12cf1335b6e4750 100644
--- a/third_party/WebKit/Source/core/paint/ObjectPainter.cpp
+++ b/third_party/WebKit/Source/core/paint/ObjectPainter.cpp
@@ -135,7 +135,7 @@ void paintComplexOutline(GraphicsContext& graphicsContext,
       continue;
 
     edges.grow(++count);
-    OutlineEdgeInfo& edge = edges.last();
+    OutlineEdgeInfo& edge = edges.back();
     edge.x1 = SkScalarTruncToInt(points[0].x());
     edge.y1 = SkScalarTruncToInt(points[0].y());
     edge.x2 = SkScalarTruncToInt(points[1].x());
@@ -174,7 +174,7 @@ void paintComplexOutline(GraphicsContext& graphicsContext,
   }
 
   DCHECK(count >= 4 && edges.size() == count);
-  int firstAdjacentWidth = adjustJoint(width, edges.last(), edges.first());
+  int firstAdjacentWidth = adjustJoint(width, edges.back(), edges.first());
 
   // The width of the angled part of starting and ending joint of the current
   // edge.