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 aec24d2f89c3eb435cc5f2f800f04f0f69330bad..8315c5dda7146ee4235e867de75c35695f60c8cb 100644
--- a/base/cpu.h
+++ b/base/cpu.h
@@ -45,6 +45,7 @@ class BASE_EXPORT CPU {
   bool has_ssse3() const { return has_ssse3_; }
   bool has_sse41() const { return has_sse41_; }
   bool has_sse42() const { return has_sse42_; }
+  bool has_aesni() const { return has_aesni_; }
   bool has_avx() const { return has_avx_; }
   // has_avx_hardware returns true when AVX is present in the CPU. This might
   // differ from the value of |has_avx()| because |has_avx()| also tests for
@@ -76,6 +77,7 @@ class BASE_EXPORT CPU {
   bool has_ssse3_;
   bool has_sse41_;
   bool has_sse42_;
+  bool has_aesni_;
   bool has_avx_;
   bool has_avx_hardware_;
   bool has_non_stop_time_stamp_counter_;