Remove cpu.has_avx_hardware()

Update NSS to remove work around cpu detection bug in nss 3.15

BUG=chromium:320524

Review URL: https://codereview.chromium.org/1381603004

Cr-Commit-Position: refs/heads/master@{#352633}

1 files changed, 0 insertions, 18 deletions

diff --git a/crypto/nss_util.cc b/crypto/nss_util.cc
index d13170c..8e378f4 100644
--- a/crypto/nss_util.cc
+++ b/crypto/nss_util.cc
@@ -682,8 +682,6 @@ class NSSInitSingleton {
     // other threads from accessing until the constructor is done.
     thread_checker_.DetachFromThread();
 
-    DisableAESNIIfNeeded();
-
     EnsureNSPRInit();
 
     // We *must* have NSS >= 3.14.3.
@@ -845,22 +843,6 @@ class NSSInitSingleton {
   }
 #endif
 
-  static void DisableAESNIIfNeeded() {
-    if (NSS_VersionCheck("3.15") && !NSS_VersionCheck("3.15.4")) {
-      // Some versions of NSS have a bug that causes AVX instructions to be
-      // used without testing whether XSAVE is enabled by the operating system.
-      // In order to work around this, we disable AES-NI in NSS when we find
-      // that |has_avx()| is false (which includes the XSAVE test). See
-      // https://bugzilla.mozilla.org/show_bug.cgi?id=940794
-      base::CPU cpu;
-
-      if (cpu.has_avx_hardware() && !cpu.has_avx()) {
-        scoped_ptr<base::Environment> env(base::Environment::Create());
-        env->SetVar("NSS_DISABLE_HW_AES", "1");
-      }
-    }
-  }
-
   bool tpm_token_enabled_for_nss_;
   bool initializing_tpm_token_;
   typedef std::vector<base::Closure> TPMReadyCallbackList;