net: boost AES-GCM ciphers if the machine has AES-NI.

base/cpu.h

Index: base/cpu.h
diff --git a/base/cpu.h b/base/cpu.h
index 509763e170f4c666089f65db1b5b81097de452a9..2b709bd9144c6eec6aa6b0851872c8b1b18dbbe7 100644
--- a/base/cpu.h
+++ b/base/cpu.h
@@ -46,6 +46,7 @@ class BASE_EXPORT CPU {
   bool has_sse41() const { return has_sse41_; }
   bool has_sse42() const { return has_sse42_; }
   bool has_avx() const { return has_avx_; }
+  bool has_aesni() const { return has_aesni_; }
   bool has_non_stop_time_stamp_counter() const {
     return has_non_stop_time_stamp_counter_;
   }
@@ -71,6 +72,7 @@ class BASE_EXPORT CPU {
   bool has_sse41_;
   bool has_sse42_;
   bool has_avx_;
+  bool has_aesni_;
   bool has_non_stop_time_stamp_counter_;
   std::string cpu_vendor_;
   std::string cpu_brand_;