[webcrypto] Add JWK import for HMAC and AES-CBC key.

content/renderer/webcrypto/webcrypto_impl.h

Index: content/renderer/webcrypto/webcrypto_impl.h
diff --git a/content/renderer/webcrypto/webcrypto_impl.h b/content/renderer/webcrypto/webcrypto_impl.h
index c1c559292c8f43c6f830e6443a42b9c2db6b79af..f867b7de2488ce6709664474fc12058116e3cf85 100644
--- a/content/renderer/webcrypto/webcrypto_impl.h
+++ b/content/renderer/webcrypto/webcrypto_impl.h
@@ -62,7 +62,6 @@ class CONTENT_EXPORT WebCryptoImpl
       unsigned data_size,
       WebKit::WebCryptoResult result);
 
-  static void ShrinkBuffer(WebKit::WebArrayBuffer* buffer, unsigned new_size);
   static WebKit::WebCryptoKey NullKey();
 
  protected:
@@ -121,6 +120,14 @@ class CONTENT_EXPORT WebCryptoImpl
       unsigned data_size,
       bool* signature_match);
 
+  bool ImportKeyJwk(
+      const unsigned char* key_data,
+      unsigned key_data_size,
+      const WebKit::WebCryptoAlgorithm& algorithm_or_null,
+      bool extractable,
+      WebKit::WebCryptoKeyUsageMask usage_mask,
+      WebKit::WebCryptoKey* key);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(WebCryptoImpl);
 };