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

third_party/WebKit/Source/platform/graphics/ContiguousContainer.cpp

Index: third_party/WebKit/Source/platform/graphics/ContiguousContainer.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/ContiguousContainer.cpp b/third_party/WebKit/Source/platform/graphics/ContiguousContainer.cpp
index f3c65902d5a9d6836331229a456cf7f4587d5eda..7ec7e759b06fef2c7627140ea006c3a9bcbe92f5 100644
--- a/third_party/WebKit/Source/platform/graphics/ContiguousContainer.cpp
+++ b/third_party/WebKit/Source/platform/graphics/ContiguousContainer.cpp
@@ -120,7 +120,7 @@ void* ContiguousContainerBase::allocate(size_t objectSize,
   if (!bufferForAlloc) {
     size_t newBufferSize = m_buffers.isEmpty()
                                ? kDefaultInitialBufferSize * m_maxObjectSize
-                               : 2 * m_buffers.last()->capacity();
+                               : 2 * m_buffers.back()->capacity();
     bufferForAlloc =
         allocateNewBufferForNextAllocation(newBufferSize, typeName);
   }
@@ -131,7 +131,7 @@ void* ContiguousContainerBase::allocate(size_t objectSize,
 }
 
 void ContiguousContainerBase::removeLast() {
-  void* object = m_elements.last();
+  void* object = m_elements.back();
   m_elements.pop_back();
 
   Buffer* endBuffer = m_buffers[m_endIndex].get();
@@ -160,7 +160,7 @@ void ContiguousContainerBase::swap(ContiguousContainerBase& other) {
 
 void ContiguousContainerBase::shrinkToFit() {
   while (m_endIndex < m_buffers.size() - 1) {
-    DCHECK(m_buffers.last()->isEmpty());
+    DCHECK(m_buffers.back()->isEmpty());
     m_buffers.pop_back();
   }
 }