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

third_party/WebKit/Source/core/html/parser/HTMLDocumentParser.cpp

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 310 matching lines @@
 
   // ApplicationCache needs to be initialized before issuing preloads. We
   // suspend preload until HTMLHTMLElement is inserted and ApplicationCache is
   // initialized. Note: link rel preloads don't follow this policy per the spec.
   // These directives should initiate a fetch as fast as possible.
   if (!m_triedLoadingLinkHeaders && document()->loader() &&
       !pendingChunks.isEmpty()) {
     // Note that on commit, the loader dispatched preloads for all the non-media
     // links.
     document()->loader()->dispatchLinkHeaderPreloads(
-        &pendingChunks.first()->viewport, LinkLoader::OnlyLoadMedia);
+        &pendingChunks.front()->viewport, LinkLoader::OnlyLoadMedia);
     m_triedLoadingLinkHeaders = true;
   }
 
   // Defer preloads if any of the chunks contains a <meta> csp tag.
   for (auto& chunk : pendingChunks) {
     if (chunk->pendingCSPMetaTokenIndex != TokenizedChunk::noPendingToken) {
       m_pendingCSPMetaToken =
           &chunk->tokens->at(chunk->pendingCSPMetaTokenIndex);
     }
   }
@@ skipping 958 matching lines @@
     case Asynchronous:
       m_loadingTaskRunner->postTask(
           BLINK_FROM_HERE,
           WTF::bind(function, std::forward<Ps>(parameters)...));
       return;
   }
   NOTREACHED();
 }
 
 }  // namespace blink