[webcrypto] order Key.usages alphabetically.

Source/modules/crypto/Key.cpp

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 41 matching lines @@
     }
     ASSERT_NOT_REACHED();
     return 0;
 }
 
 struct KeyUsageMapping {
     blink::WebCryptoKeyUsage value;
     const char* const name;
 };
 
+// Keep this array sorted.
 const KeyUsageMapping keyUsageMappings[] = {
+    { blink::WebCryptoKeyUsageDecrypt, "decrypt" },
+    { blink::WebCryptoKeyUsageDeriveKey, "deriveKey" },
     { blink::WebCryptoKeyUsageEncrypt, "encrypt" },
-    { blink::WebCryptoKeyUsageDecrypt, "decrypt" },
     { blink::WebCryptoKeyUsageSign, "sign" },
+    { blink::WebCryptoKeyUsageUnwrapKey, "unwrapKey" },
     { blink::WebCryptoKeyUsageVerify, "verify" },
-    { blink::WebCryptoKeyUsageDeriveKey, "deriveKey" },
     { blink::WebCryptoKeyUsageWrapKey, "wrapKey" },
-    { blink::WebCryptoKeyUsageUnwrapKey, "unwrapKey" },
 };
 
 COMPILE_ASSERT(blink::EndOfWebCryptoKeyUsage == (1 << 6) + 1, update_keyUsageMappings);
 
 const char* keyUsageToString(blink::WebCryptoKeyUsage usage)
 {
     for (size_t i = 0; i < WTF_ARRAY_LENGTH(keyUsageMappings); ++i) {
         if (keyUsageMappings[i].value == usage)
             return keyUsageMappings[i].name;
     }
@@ skipping 154 matching lines @@
         if (!usage) {
             exceptionState.throwTypeError("Invalid keyUsages argument");
             return false;
         }
         mask |= usage;
     }
     return true;
 }
 
 } // namespace WebCore