[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 f0b7dc514a27d13fdbbed1fb3e1b2544d0ea149b..87e0da8a3a0d94a69f12d3fc7ebb771184b5fcc4 100644
--- a/content/renderer/webcrypto/webcrypto_impl.h
+++ b/content/renderer/webcrypto/webcrypto_impl.h
@@ -17,6 +17,7 @@ class CONTENT_EXPORT WebCryptoImpl
     : NON_EXPORTED_BASE(public WebKit::WebCrypto) {
  public:
   WebCryptoImpl();
+  virtual ~WebCryptoImpl();
 
   virtual void encrypt(
       const WebKit::WebCryptoAlgorithm& algorithm,
@@ -63,8 +64,6 @@ class CONTENT_EXPORT WebCryptoImpl
       unsigned data_size,
       WebKit::WebCryptoResult result);
 
-  static void ShrinkBuffer(WebKit::WebArrayBuffer* buffer, unsigned new_size);
-
  protected:
   friend class WebCryptoImplTest;
 
@@ -114,6 +113,15 @@ class CONTENT_EXPORT WebCryptoImpl
       unsigned data_size,
       bool* signature_match);
 
+  bool ImportKeyJwk(
+      const unsigned char* key_data,
+      unsigned key_data_size,
+      bool extractable,
+      const WebKit::WebCryptoAlgorithm& algorithm,
+      WebKit::WebCryptoKeyUsageMask usage_mask,
+      scoped_ptr<WebKit::WebCryptoKeyHandle>* handle,
+      WebKit::WebCryptoKeyType* type);
+
  private:
   DISALLOW_COPY_AND_ASSIGN(WebCryptoImpl);
 };