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

third_party/WebKit/Source/core/layout/VisualRectMappingTest.cpp

 // Copyright 2015 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/layout/LayoutTestHelper.h"
 #include "core/layout/LayoutView.h"
 #include "core/layout/PaintInvalidationState.h"
 #include "core/paint/PaintLayer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 26 matching lines @@
     if (layoutView != object)
       paintInvalidationStates[0]->updateForChildren(PaintInvalidationFull);
     for (size_t i = 1; i < paintInvalidationStates.size(); ++i) {
       paintInvalidationStates[i].emplace(*paintInvalidationStates[i - 1],
                                          *ancestors[ancestors.size() - i]);
       if (paintInvalidationStates[i]->m_currentObject != object)
         paintInvalidationStates[i]->updateForChildren(PaintInvalidationFull);
     }
 
     const PaintInvalidationState& paintInvalidationState =
-        *paintInvalidationStates.last();
+        *paintInvalidationStates.back();
     ASSERT_EQ(paintInvalidationState.m_currentObject, object);
     ASSERT_EQ(&paintInvalidationState.paintInvalidationContainer(),
               &paintInvalidationContainer);
 
     LayoutRect r = rect;
     paintInvalidationState.mapLocalRectToPaintInvalidationContainer(r);
     EXPECT_EQ(expectedRect, r);
   }
 };
 
@@ skipping 633 matching lines @@
   LayoutRect targetVisualRect = target->localVisualRect();
   EXPECT_EQ(LayoutRect(0, 0, 400, 400), targetVisualRect);
   LayoutRect rect = targetVisualRect;
   EXPECT_TRUE(target->mapToVisualRectInAncestorSpace(&layoutView(), rect));
   EXPECT_EQ(LayoutRect(0, 0, 200, 200), rect);
   checkPaintInvalidationStateRectMapping(rect, targetVisualRect, *target,
                                          layoutView(), layoutView());
 }
 
 }  // namespace blink