[webcrypto] exportKey() now returns dictionary when format='jwk' (CL 2 of 2).

Source/modules/crypto/CryptoResultImpl.h

Index: Source/modules/crypto/CryptoResultImpl.h
diff --git a/Source/modules/crypto/CryptoResultImpl.h b/Source/modules/crypto/CryptoResultImpl.h
index 0465969fe17e86c54995b7ca247752432e2f290c..c589ee196dad4cc8fbfed058ac5be90ef0b432ad 100644
--- a/Source/modules/crypto/CryptoResultImpl.h
+++ b/Source/modules/crypto/CryptoResultImpl.h
@@ -60,6 +60,7 @@ public:
 
     virtual void completeWithError(blink::WebCryptoErrorType, const blink::WebString&) OVERRIDE;
     virtual void completeWithBuffer(const blink::WebArrayBuffer&) OVERRIDE;
+    virtual void completeWithJson(const char* utf8Data, unsigned length) OVERRIDE;
     virtual void completeWithBoolean(bool) OVERRIDE;
     virtual void completeWithKey(const blink::WebCryptoKey&) OVERRIDE;
     virtual void completeWithKeyPair(const blink::WebCryptoKey& publicKey, const blink::WebCryptoKey& privateKey) OVERRIDE;