Move ExtensionFunctionRegistry out of src/chrome

chrome/browser/extensions/extension_function_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_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_REGISTRY_H_
-#define CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_REGISTRY_H_
-
-#include <map>
-#include <string>
-#include <vector>
-
-#include "extensions/browser/extension_function_histogram_value.h"
-
-class ExtensionFunction;
-
-// A factory function for creating new ExtensionFunction instances.
-typedef ExtensionFunction* (*ExtensionFunctionFactory)();
-
-// Template for defining ExtensionFunctionFactory.
-template<class T>
-ExtensionFunction* NewExtensionFunction() {
-  return new T();
-}
-
-// Contains a list of all known extension functions and allows clients to
-// create instances of them.
-class ExtensionFunctionRegistry {
- public:
-  static ExtensionFunctionRegistry* GetInstance();
-  explicit ExtensionFunctionRegistry();
-  virtual ~ExtensionFunctionRegistry();
-
-  // Resets all functions to their default values.
-  void ResetFunctions();
-
-  // Adds all function names to 'names'.
-  void GetAllNames(std::vector<std::string>* names);
-
-  // Allows overriding of specific functions (e.g. for testing).  Functions
-  // must be previously registered.  Returns true if successful.
-  bool OverrideFunction(const std::string& name,
-                        ExtensionFunctionFactory factory);
-
-  // Factory method for the ExtensionFunction registered as 'name'.
-  ExtensionFunction* NewFunction(const std::string& name);
-
-  template<class T>
-  void RegisterFunction() {
-    ExtensionFunctionFactory factory = &NewExtensionFunction<T>;
-    factories_[T::function_name()] =
-        FactoryEntry(factory, T::histogram_value());
-  }
-
-  struct FactoryEntry {
-   public:
-    explicit FactoryEntry();
-    explicit FactoryEntry(ExtensionFunctionFactory factory,
-      extensions::functions::HistogramValue histogram_value);
-
-    ExtensionFunctionFactory factory_;
-    extensions::functions::HistogramValue histogram_value_;
-  };
-
-  typedef std::map<std::string, FactoryEntry> FactoryMap;
-  FactoryMap factories_;
-};
-
-#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_FUNCTION_REGISTRY_H_