Revert "[webcrypto] Add decrypt() for AES-CBC."

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 9b2dd3e031d1edd295e428fa610852be15336d75..e58704408c66eb9cbc55942286ff277c395bf199 100644
--- a/content/renderer/webcrypto/webcrypto_impl.h
+++ b/content/renderer/webcrypto/webcrypto_impl.h
@@ -24,12 +24,6 @@ class CONTENT_EXPORT WebCryptoImpl
       const unsigned char* data,
       unsigned data_size,
       WebKit::WebCryptoResult result);
-  virtual void decrypt(
-      const WebKit::WebCryptoAlgorithm& algorithm,
-      const WebKit::WebCryptoKey& key,
-      const unsigned char* data,
-      unsigned data_size,
-      WebKit::WebCryptoResult result);
   virtual void digest(
       const WebKit::WebCryptoAlgorithm& algorithm,
       const unsigned char* data,
@@ -69,12 +63,6 @@ class CONTENT_EXPORT WebCryptoImpl
       const unsigned char* data,
       unsigned data_size,
       WebKit::WebArrayBuffer* buffer);
-  bool DecryptInternal(
-      const WebKit::WebCryptoAlgorithm& algorithm,
-      const WebKit::WebCryptoKey& key,
-      const unsigned char* data,
-      unsigned data_size,
-      WebKit::WebArrayBuffer* buffer);
   bool DigestInternal(
       const WebKit::WebCryptoAlgorithm& algorithm,
       const unsigned char* data,