Splits ash_test_resources_100_percent into two pak files

ash/test/ash_test_environment_default.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/test/ash_test_environment.h"
 
 #include "ash/test/ash_test_views_delegate.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 35 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(AshTestEnvironmentDefault);
 };
 
 }  // namespace
 
 // static
 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