Disable Poly1305 NEON code again.

crypto/openssl_util.cc

Index: crypto/openssl_util.cc
diff --git a/crypto/openssl_util.cc b/crypto/openssl_util.cc
index 94bf246a7cdbe3d8d02bfdae2acc70c6272d32a0..6f348ff1a54c0365f8becb70d68ae2f079429b84 100644
--- a/crypto/openssl_util.cc
+++ b/crypto/openssl_util.cc
@@ -62,6 +62,10 @@ class OpenSSLInitSingleton {
         (android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0;
     if (has_neon)
       CRYPTO_set_NEON_capable(1);
+    // In all cases, currently, mark the NEON unit as broken because some
+    // phones can't execute the Poly1305 code correctly. See
+    // https://code.google.com/p/chromium/issues/detail?id=341598
+    CRYPTO_set_NEON_functional(0);
 #endif
   }