Fix gtest main from including the wrong headers.

BUILD.gn

@@ -158,9 +158,14 @@ if (is_win && target_cpu != "arm64") {
   }
 }
 
+config("includes_config") {
+  include_dirs = [ "include" ]
+}
+
 # Holds the shared includes so we only need to list them once.
 angle_source_set("includes") {
   sources = libangle_includes
+  public_configs = [ ":includes_config" ]
 }
 
 angle_static_library("preprocessor") {

src/tests/BUILD.gn

@@ -96,12 +96,10 @@ template("angle_tests_main") {
     deps = [
       "${angle_root}:includes",
     ]
-    configs += [ "${angle_root}:internal_config" ]
 
     main = invoker.main
 
     if (build_with_chromium) {
-      include_dirs = [ "../.." ]
       sources = [
         "//gpu/$main.cc",
       ]