Migrate WTF::Vector::append() to ::push_back() [part 6 of N]

third_party/WebKit/Source/core/fetch/CrossOriginAccessControl.cpp

 /*
  * Copyright (C) 2008 Apple 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 50 matching lines @@
     if (FetchUtils::isSimpleHeader(header.key, header.value)) {
       // Exclude simple headers.
       continue;
     }
     if (equalIgnoringCase(header.key, "referer")) {
       // When the request is from a Worker, referrer header was added by
       // WorkerThreadableLoader. But it should not be added to
       // Access-Control-Request-Headers header.
       continue;
     }
-    filteredHeaders.append(header.key.lower());
+    filteredHeaders.push_back(header.key.lower());
   }
 
   // Sort header names lexicographically.
   std::sort(filteredHeaders.begin(), filteredHeaders.end(),
             WTF::codePointCompareLessThan);
   StringBuilder headerBuffer;
   for (const String& header : filteredHeaders) {
     if (!headerBuffer.isEmpty())
       headerBuffer.append(", ");
     headerBuffer.append(header);
@@ skipping 345 matching lines @@
     //
     // This is equivalent to the step 2 in
     // https://fetch.spec.whatwg.org/#http-network-or-cache-fetch
     if (options.credentialsRequested == ClientDidNotRequestCredentials)
       options.allowCredentials = DoNotAllowStoredCredentials;
   }
   return true;
 }
 
 }  // namespace blink