Remove an unncessary check on signature length being 0.

content/child/webcrypto/algorithm_dispatch.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/child/webcrypto/algorithm_dispatch.h"
 
 #include "base/logging.h"
 #include "content/child/webcrypto/algorithm_implementation.h"
 #include "content/child/webcrypto/algorithm_registry.h"
 #include "content/child/webcrypto/crypto_data.h"
@@ skipping 194 matching lines @@
 Status Verify(const blink::WebCryptoAlgorithm& algorithm,
               const blink::WebCryptoKey& key,
               const CryptoData& signature,
               const CryptoData& data,
               bool* signature_match) {
   if (!KeyUsageAllows(key, blink::WebCryptoKeyUsageVerify))
     return Status::ErrorUnexpected();
   if (algorithm.id() != key.algorithm().id())
     return Status::ErrorUnexpected();
 
-  // TODO(eroman): Move this into implementation which need it instead.
-  if (!signature.byte_length()) {
-    // None of the algorithms generate valid zero-length signatures so this
-    // will necessarily fail verification. Early return to protect
-    // implementations from dealing with a NULL signature pointer.
-    *signature_match = false;
-    return Status::Success();
-  }
-
   const AlgorithmImplementation* impl = NULL;
   Status status = GetAlgorithmImplementation(algorithm.id(), &impl);
   if (status.IsError())
     return status;
 
   return impl->Verify(algorithm, key, signature, data, signature_match);
 }
 
 Status WrapKey(blink::WebCryptoKeyFormat format,
                const blink::WebCryptoKey& key_to_wrap,
@@ skipping 51 matching lines @@
 
 scoped_ptr<blink::WebCryptoDigestor> CreateDigestor(
     blink::WebCryptoAlgorithmId algorithm) {
   PlatformInit();
   return CreatePlatformDigestor(algorithm);
 }
 
 }  // namespace webcrypto
 
 }  // namespace content