Call EnsureOpenSSLInit from BufferPoolSingleton constructor

(cherry picked from commit 617ba30)

Bug: 1462345
Change-Id: If2bb86cdacd2156edc07b441260c86aa4d2ec1dc
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4660070
Commit-Queue: Matt Mueller <mattm@chromium.org>
Auto-Submit: Matt Mueller <mattm@chromium.org>
Commit-Queue: David Benjamin <davidben@chromium.org>
Reviewed-by: David Benjamin <davidben@chromium.org>
Cr-Original-Commit-Position: refs/heads/main@{#1166042}
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4669961
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/branch-heads/5845@{#355}
Cr-Branched-From: 5a5dff6-refs/heads/main@{#1160321}

net/cert/x509_util.cc

@@ -80,7 +80,12 @@ const EVP_MD* ToEVP(DigestAlgorithm alg) {
 
 class BufferPoolSingleton {
  public:
-  BufferPoolSingleton() : pool_(CRYPTO_BUFFER_POOL_new()) {}
+  BufferPoolSingleton() {
+    crypto::EnsureOpenSSLInit();
+
+    pool_ = CRYPTO_BUFFER_POOL_new();
+  }
+
   CRYPTO_BUFFER_POOL* pool() { return pool_; }
 
  private: