Move error classification into the ssl_errors component

components/ssl_errors/BUILD.gn

Index: components/ssl_errors/BUILD.gn
diff --git a/components/ssl_errors/BUILD.gn b/components/ssl_errors/BUILD.gn
index fc3da1526b2e4e415bccf91b3853605c0104ad4a..cc1c7cebcf6c63b203e02fac7cf04cea25961902 100644
--- a/components/ssl_errors/BUILD.gn
+++ b/components/ssl_errors/BUILD.gn
@@ -5,6 +5,8 @@
 # GYP version: components/ssl_errors.gyp
 source_set("ssl_errors") {
   sources = [
+    "error_classification.cc",
+    "error_classification.h",
     "error_info.cc",
     "error_info.h",
   ]
@@ -16,3 +18,15 @@ source_set("ssl_errors") {
     "//ui/base",
   ]
 }
+
+source_set("unit_tests") {
+  testonly = true
+  sources = [
+    "error_classification_unittests.cc",
+  ]
+
+  deps = [
+    ":ssl_errors",
+    "//testing/gtest",
+  ]
+}