Add support for using AMD modules from extensions modules.

extensions/renderer/v8_schema_registry.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_V8_SCHEMA_REGISTRY_H_
 #define EXTENSIONS_RENDERER_V8_SCHEMA_REGISTRY_H_
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
-#include "extensions/renderer/scoped_persistent.h"
+#include "gin/public/context_holder.h"
 #include "v8/include/v8-util.h"
 #include "v8/include/v8.h"
 
 namespace extensions {
 class NativeHandler;
 
 // A registry for the v8::Value representations of extension API schemas.
 // In a way, the v8 counterpart to ExtensionAPI.
 class V8SchemaRegistry {
  public:
@@ skipping 11 matching lines @@
 
  private:
   // Gets the separate context that backs the registry, creating a new one if
   // if necessary. Will also initialize schema_cache_.
   v8::Handle<v8::Context> GetOrCreateContext(v8::Isolate* isolate);
 
   // Cache of schemas. Created lazily by GetOrCreateContext.
   typedef v8::StdPersistentValueMap<std::string, v8::Object> SchemaCache;
   scoped_ptr<SchemaCache> schema_cache_;
 
-  // Single per-instance v8::Context to create v8::Values.
+  // Single per-instance gin::ContextHolder to create v8::Values.
   // Created lazily via GetOrCreateContext.
-  ScopedPersistent<v8::Context> context_;
+  scoped_ptr<gin::ContextHolder> context_holder_;
 
   DISALLOW_COPY_AND_ASSIGN(V8SchemaRegistry);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_V8_SCHEMA_REGISTRY_H_