Lazily load API schemas from resource files and convert all APIs to features

chrome/renderer/extensions/v8_schema_registry.h

 // Copyright (c) 2012 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 CHROME_RENDERER_EXTENSIONS_V8_SCHEMA_REGISTRY_H_
 #define CHROME_RENDERER_EXTENSIONS_V8_SCHEMA_REGISTRY_H_
 
 #include <map>
-#include <set>
 #include <string>
+#include <vector>
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "chrome/renderer/extensions/scoped_persistent.h"
 #include "chrome/renderer/extensions/unsafe_persistent.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:
   V8SchemaRegistry();
   ~V8SchemaRegistry();
 
   // Creates a NativeHandler wrapper |this|. Supports GetSchema.
   scoped_ptr<NativeHandler> AsNativeHandler();
 
   // Returns a v8::Array with all the schemas for the APIs in |apis|.
-  v8::Handle<v8::Array> GetSchemas(const std::set<std::string>& apis);
+  v8::Handle<v8::Array> GetSchemas(const std::vector<std::string>& apis);
 
   // Returns a v8::Object for the schema for |api|, possibly from the cache.
   v8::Handle<v8::Object> GetSchema(const std::string& api);
 
  private:
   // Gets the separate context that backs the registry, creating a new one if
   // if necessary.
   v8::Handle<v8::Context> GetOrCreateContext(v8::Isolate* isolate);
 
   // Cache of schemas.
   //
   // Storing UnsafePersistents is safe here, because the corresponding
   // Persistent handle is created in GetSchema(), and it keeps the data pointed
   // by the UnsafePersistent alive. It's not made weak or disposed, and nobody
   // else has access to it. The Persistent is then disposed in the dtor.
   typedef std::map<std::string, UnsafePersistent<v8::Object> > SchemaCache;
   SchemaCache schema_cache_;
 
   // Single per-instance v8::Context to create v8::Values.
   // Created lazily via GetOrCreateContext.
   ScopedPersistent<v8::Context> context_;
 
   DISALLOW_COPY_AND_ASSIGN(V8SchemaRegistry);
 };
 
 }  // namespace extensions
 
 #endif  // CHROME_RENDERER_EXTENSIONS_V8_SCHEMA_REGISTRY_H_