[webcrypto] Add support for import/export of "raw" formatted EC keys.

components/webcrypto/fuzzer_support.h

Index: components/webcrypto/fuzzer_support.h
diff --git a/components/webcrypto/fuzzer_support.h b/components/webcrypto/fuzzer_support.h
index 43cde789f38f5f4571328ab0adbb60d29305e94c..4ca621b0e332c48875f365e6769bc7d868a28bc4 100644
--- a/components/webcrypto/fuzzer_support.h
+++ b/components/webcrypto/fuzzer_support.h
@@ -16,6 +16,8 @@ void ImportEcKeyFromDerFuzzData(const uint8_t* data,
                                 size_t size,
                                 blink::WebCryptoKeyFormat format);
 
+void ImportEcKeyFromRawFuzzData(const uint8_t* data, size_t size);
+
 void ImportRsaKeyFromDerFuzzData(const uint8_t* data,
                                  size_t size,
                                  blink::WebCryptoKeyFormat format);