Use BoringSSL for RNG in QUIC

This is what we already do in the internal version

Merge internal change: 219706088

R=rch@chromium.org

Change-Id: I6dec6e90cd0022fd1047551b7aa7fd4b939c9d7b
Reviewed-on: https://chromium-review.googlesource.com/c/1313333Reviewed-by: Ryan Hamilton <rch@chromium.org>
Commit-Queue: Ryan Hamilton <rch@chromium.org>
Cr-Commit-Position: refs/heads/master@{#604777}

net/third_party/quic/core/crypto/quic_random.cc

@@ -5,9 +5,9 @@
 #include "net/third_party/quic/core/crypto/quic_random.h"
 
 #include "base/macros.h"
-#include "crypto/random.h"
 #include "net/third_party/quic/platform/api/quic_bug_tracker.h"
 #include "net/third_party/quic/platform/api/quic_singleton.h"
+#include "third_party/boringssl/src/include/openssl/rand.h"
 
 namespace quic {
 
@@ -35,7 +35,7 @@ DefaultRandom* DefaultRandom::GetInstance() {
 }
 
 void DefaultRandom::RandBytes(void* data, size_t len) {
-  crypto::RandBytes(data, len);
+  RAND_bytes(reinterpret_cast<uint8_t*>(data), len);
 }
 
 uint64_t DefaultRandom::RandUint64() {