Migrate WTF::Vector::append() to ::push_back() [part 13 of N]

third_party/WebKit/Source/modules/crypto/CryptoKey.cpp

Index: third_party/WebKit/Source/modules/crypto/CryptoKey.cpp
diff --git a/third_party/WebKit/Source/modules/crypto/CryptoKey.cpp b/third_party/WebKit/Source/modules/crypto/CryptoKey.cpp
index bdca341b6758c72bee8a12397eac6a785f80cb7f..9c0c46f7123b6e4c5f1d146a5d3f16e988cc3d3f 100644
--- a/third_party/WebKit/Source/modules/crypto/CryptoKey.cpp
+++ b/third_party/WebKit/Source/modules/crypto/CryptoKey.cpp
@@ -158,7 +158,7 @@ Vector<String> CryptoKey::usages() const {
   for (size_t i = 0; i < WTF_ARRAY_LENGTH(keyUsageMappings); ++i) {
     WebCryptoKeyUsage usage = keyUsageMappings[i].value;
     if (m_key.usages() & usage)
-      result.append(keyUsageToString(usage));
+      result.push_back(keyUsageToString(usage));
   }
   return result;
 }