Implement verify() for HMAC using NSS

content/renderer/webcrypto_impl.h

Index: content/renderer/webcrypto_impl.h
diff --git a/content/renderer/webcrypto_impl.h b/content/renderer/webcrypto_impl.h
index a2c8a87dd6463170b5c1d84dda24521acdbb3910..41adf6497e705273b30040e63be7d2f9eadc13f3 100644
--- a/content/renderer/webcrypto_impl.h
+++ b/content/renderer/webcrypto_impl.h
@@ -37,6 +37,14 @@ class CONTENT_EXPORT WebCryptoImpl
       const unsigned char* data,
       unsigned data_size,
       WebKit::WebCryptoResult result);
+  virtual void verifySignature(
+      const WebKit::WebCryptoAlgorithm& algorithm,
+      const WebKit::WebCryptoKey& key,
+      const unsigned char* signature,
+      unsigned signature_size,
+      const unsigned char* data,
+      unsigned data_size,
+      WebKit::WebCryptoResult result);
 
  protected:
   friend class WebCryptoImplTest;
@@ -62,6 +70,14 @@ class CONTENT_EXPORT WebCryptoImpl
       const unsigned char* data,
       unsigned data_size,
       WebKit::WebArrayBuffer* buffer);
+  bool VerifySignatureInternal(
+      const WebKit::WebCryptoAlgorithm& algorithm,
+      const WebKit::WebCryptoKey& key,
+      const unsigned char* signature,
+      unsigned signature_size,
+      const unsigned char* data,
+      unsigned data_size,
+      bool* signature_match);
 
  private:
   DISALLOW_COPY_AND_ASSIGN(WebCryptoImpl);