Splits ash_test_resources_100_percent into two pak files

ash/test/ash_test_environment_default.cc

Index: ash/test/ash_test_environment_default.cc
diff --git a/ash/test/ash_test_environment_default.cc b/ash/test/ash_test_environment_default.cc
index f1d9d3280e87eb246058e77d6565ad0fb3f2b5bc..b070ce60c2974fbd75198de36499aaa3a9c15267 100644
--- a/ash/test/ash_test_environment_default.cc
+++ b/ash/test/ash_test_environment_default.cc
@@ -53,5 +53,10 @@ std::unique_ptr<AshTestEnvironment> AshTestEnvironment::Create() {
   return base::MakeUnique<AshTestEnvironmentDefault>();
 }
 
+// static
+std::string AshTestEnvironment::Get100PercentResourceFileName() {
+  return "ash_test_resources_100_percent.pak";
+}
+
 }  // namespace test
 }  // namespace ash