Update from https://crrev.com/306706

net/BUILD.gn

Index: net/BUILD.gn
diff --git a/net/BUILD.gn b/net/BUILD.gn
index a9d20aa2f6d4077b6dd2e22895b7f47e19198218..fab7665f1fff7d502dcbde7a886e695f94ed8fc4 100644
--- a/net/BUILD.gn
+++ b/net/BUILD.gn
@@ -251,7 +251,7 @@ component("net") {
     }
     if (is_win) {
       sources -= [
-        "cert/cert/sha256_legacy_support_nss_win.cc",
+        "cert/sha256_legacy_support_nss_win.cc",
       ]
     }
   } else {
@@ -500,6 +500,10 @@ component("net") {
     ]
   }
 
+  if (is_ios || is_mac) {
+    sources += gypi_values.net_base_mac_ios_sources
+  }
+
   if (is_android) {
     # Add some Linux sources that were excluded by the filter, but which
     # are needed.
@@ -1150,6 +1154,10 @@ test("net_unittests") {
     ]
   }
 
+  if (is_mac || is_ios) {
+    sources += gypi_values.net_base_test_mac_ios_sources
+  }
+
   if (is_chromeos) {
     sources -= [
       "proxy/proxy_config_service_linux_unittest.cc",