[Extensions Bindings] Store API type methods in the reference map

extensions/renderer/api_type_reference_map.h

 // Copyright 2017 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_API_TYPE_REFERENCE_MAP_H_
 #define EXTENSIONS_RENDERER_API_TYPE_REFERENCE_MAP_H_
 
 #include <map>
 #include <memory>
 #include <string>
 
 #include "base/callback.h"
 #include "base/macros.h"
 
 namespace extensions {
+class APISignature;
 class ArgumentSpec;
 
-// A map from type name -> ArgumentSpec for API type definitions. This is used
-// when an argument is declared to be a reference to a type defined elsewhere.
+// A map storing type specifications and method signatures for API definitions.
 class APITypeReferenceMap {
  public:
   // A callback used to initialize an unknown type, so that these can be
   // created lazily.
   using InitializeTypeCallback = base::Callback<void(const std::string& name)>;
 
   explicit APITypeReferenceMap(const InitializeTypeCallback& initialize_type);
   ~APITypeReferenceMap();
 
   // Adds the |spec| to the map under the given |name|.
   void AddSpec(const std::string& name, std::unique_ptr<ArgumentSpec> spec);
 
   // Returns the spec for the given |name|.
   const ArgumentSpec* GetSpec(const std::string& name) const;
 
+  // Adds the |signature| to the map under the given |name|. |name| is expected
+  // to be fully qualified with API, type, and method (e.g.
+  // storage.StorageArea.get).
+  void AddTypeMethodSignature(const std::string& name,
+                              std::unique_ptr<APISignature> signature);
+
+  // Returns the signature for the given |name|. |name| is expected
+  // to be fully qualified with API, type, and method (e.g.
+  // storage.StorageArea.get).
+  const APISignature* GetTypeMethodSignature(const std::string& name) const;
+
   bool empty() const { return type_refs_.empty(); }
   size_t size() const { return type_refs_.size(); }
 
  private:
   InitializeTypeCallback initialize_type_;
 
   std::map<std::string, std::unique_ptr<ArgumentSpec>> type_refs_;
 
+  std::map<std::string, std::unique_ptr<APISignature>> type_methods_;
+
   DISALLOW_COPY_AND_ASSIGN(APITypeReferenceMap);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_RENDERER_API_TYPE_REFERENCE_MAP_H_