[Extensions Bindings] Pull out test resources

extensions/renderer/module_system_test.h

 // Copyright 2014 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.
 
 #ifndef EXTENSIONS_RENDERER_MODULE_SYSTEM_TEST_H_
 #define EXTENSIONS_RENDERER_MODULE_SYSTEM_TEST_H_
 
 #include "base/macros.h"
 #include "extensions/renderer/module_system.h"
 #include "extensions/renderer/script_context.h"
 #include "gin/public/context_holder.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
+class StringSourceMap;
 
 class ModuleSystemTestEnvironment {
  public:
   class AssertNatives;
-  class StringSourceMap;
 
   explicit ModuleSystemTestEnvironment(v8::Isolate* isolate);
   ~ModuleSystemTestEnvironment();
 
   // Register a named JS module in the module system.
   void RegisterModule(const std::string& name, const std::string& code);
 
   // Register a named JS module with source retrieved from a ResourceBundle.
   void RegisterModule(const std::string& name, int resource_id);
 
@@ skipping 71 matching lines @@
   std::unique_ptr<ModuleSystemTestEnvironment> env_;
   bool should_assertions_be_made_;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ModuleSystemTest);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_MODULE_SYSTEM_TEST_H_