[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 b194c9f6a1211c2b7902c78648072a295a20c1dc..b39bf4209f2d69f6a89186bdf640810e49d2d524 100644
--- a/content/renderer/webcrypto/webcrypto_impl.h
+++ b/content/renderer/webcrypto/webcrypto_impl.h
@@ -66,7 +66,6 @@ class CONTENT_EXPORT WebCryptoImpl
       unsigned data_size,
       blink::WebCryptoResult result);
 
-  static void ShrinkBuffer(blink::WebArrayBuffer* buffer, unsigned new_size);
 
  protected:
   friend class WebCryptoImplTest;
@@ -128,6 +127,14 @@ class CONTENT_EXPORT WebCryptoImpl
       unsigned data_size,
       bool* signature_match);
 
+  bool ImportKeyJwk(
+      const unsigned char* key_data,
+      unsigned key_data_size,
+      const blink::WebCryptoAlgorithm& algorithm_or_null,
+      bool extractable,
+      blink::WebCryptoKeyUsageMask usage_mask,
+      blink::WebCryptoKey* key);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(WebCryptoImpl);
 };