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

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

Index: third_party/WebKit/Source/core/layout/BidiRunForLine.cpp
diff --git a/third_party/WebKit/Source/core/layout/BidiRunForLine.cpp b/third_party/WebKit/Source/core/layout/BidiRunForLine.cpp
index 941e4a111de48f73cd55051537a90369b6323f56..a497cf9c3340e9812ee7244c4fe357bc6553e0ff 100644
--- a/third_party/WebKit/Source/core/layout/BidiRunForLine.cpp
+++ b/third_party/WebKit/Source/core/layout/BidiRunForLine.cpp
@@ -118,7 +118,7 @@ void constructBidiRunsForLine(InlineBidiResolver& topResolver,
   while (!topResolver.isolatedRuns().isEmpty()) {
     // It does not matter which order we resolve the runs as long as we
     // resolve them all.
-    BidiIsolatedRun isolatedRun = topResolver.isolatedRuns().last();
+    BidiIsolatedRun isolatedRun = topResolver.isolatedRuns().back();
     topResolver.isolatedRuns().pop_back();
     currentRoot = isolatedRun.root;
 
@@ -178,7 +178,7 @@ void constructBidiRunsForLine(InlineBidiResolver& topResolver,
     // If we encountered any nested isolate runs, save them for later
     // processing.
     while (!isolatedResolver.isolatedRuns().isEmpty()) {
-      BidiIsolatedRun runWithContext = isolatedResolver.isolatedRuns().last();
+      BidiIsolatedRun runWithContext = isolatedResolver.isolatedRuns().back();
       isolatedResolver.isolatedRuns().pop_back();
       topResolver.setMidpointStateForIsolatedRun(
           runWithContext.runToReplace,