Support building BoringSSL with NSS certificates.

chrome/common/net/BUILD.gn

Index: chrome/common/net/BUILD.gn
diff --git a/chrome/common/net/BUILD.gn b/chrome/common/net/BUILD.gn
index b69512ca9d6505ce59904288b74a116c853a4b54..b73de58a0f24044fc3b7c64b72b292a9922a2ba1 100644
--- a/chrome/common/net/BUILD.gn
+++ b/chrome/common/net/BUILD.gn
@@ -30,31 +30,25 @@ static_library("net") {
   ]
 
   if (is_ios) {
-    sources -= [
-      "net_resource_provider.cc",
-      "x509_certificate_model.cc",
-    ]
+    sources -= [ "net_resource_provider.cc" ]
   } else {
     deps += [ "//gpu/ipc" ]
   }
 
-  if (is_win || is_mac || is_ios) {
-    sources -= [
-      "x509_certificate_model_nss.cc",
-      "x509_certificate_model_openssl.cc",
-    ]
-  } else if (use_openssl) {
-    sources -= [ "x509_certificate_model_nss.cc" ]
+  if (is_android || is_ios) {
+    sources -= [ "x509_certificate_model.cc" ]
+  }
+
+  if (use_openssl_certs && !is_android) {
+    deps += [ "//third_party/boringssl" ]
   } else {
     sources -= [ "x509_certificate_model_openssl.cc" ]
   }
 
-  if (is_android) {
-    sources -= [
-      "x509_certificate_model.cc",
-      "x509_certificate_model_openssl.cc",
-    ]
-    deps += [ "//third_party/boringssl" ]
+  if (use_nss_certs) {
+    deps += [ "//crypto:platform" ]
+  } else {
+    sources -= [ "x509_certificate_model_nss.cc" ]
   }
 
   configs += [ "//build/config/compiler:no_size_t_to_int_warning" ]