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diff --git a/chrome/browser/extensions/chrome_extension_function.h b/chrome/browser/extensions/chrome_extension_function.h
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+// Copyright 2013 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_CHROME_EXTENSION_FUNCTION_H_
+#define CHROME_BROWSER_EXTENSIONS_CHROME_EXTENSION_FUNCTION_H_
+
+#include "chrome/browser/extensions/extension_function.h"
+
+class Browser;
+class Profile;
+
+namespace content {
+class WebContents;
+}
+
+namespace extensions {
+class WindowController;
+}
+
+// A chrome specific analog to AsyncExtensionFunction. This has access
+// the a chrome Profile.
+class ChromeAsyncExtensionFunction : public UIThreadExtensionFunction {
+ public:
+  ChromeAsyncExtensionFunction();
+
+  Profile* GetProfile() const;
+
+  // Returns true if this function (and the profile and extension that it was
+  // invoked from) can operate on the window wrapped by |window_controller|.
+  bool CanOperateOnWindow(const extensions::WindowController* window_controller)
+      const;
+
+  // Gets the "current" browser, if any.
+  //
+  // Many extension APIs operate relative to the current browser, which is the
+  // browser the calling code is running inside of. For example, popups, tabs,
+  // and infobars all have a containing browser, but background pages and
+  // notification bubbles do not.
+  //
+  // If there is no containing window, the current browser defaults to the
+  // foremost one.
+  //
+  // Incognito browsers are not considered unless the calling extension has
+  // incognito access enabled.
+  //
+  // This method can return NULL if there is no matching browser, which can
+  // happen if only incognito windows are open, or early in startup or shutdown
+  // shutdown when there are no active windows.
+  //
+  // TODO(stevenjb): Replace this with GetExtensionWindowController().
+  Browser* GetCurrentBrowser();
+
+  // Same as above but uses WindowControllerList instead of BrowserList.
+  extensions::WindowController* GetExtensionWindowController();
+
+  // Gets the "current" web contents if any. If there is no associated web
+  // contents then defaults to the foremost one.
+  virtual content::WebContents* GetAssociatedWebContents() OVERRIDE;
+
+ protected:
+  virtual ~ChromeAsyncExtensionFunction();
+};
+
+// A chrome specific analog to SyncExtensionFunction. This has access
+// the a chrome Profile.
+class ChromeSyncExtensionFunction : public ChromeAsyncExtensionFunction {
+ public:
+  ChromeSyncExtensionFunction();
+
+  virtual void Run() OVERRIDE;
+
+ protected:
+  virtual ~ChromeSyncExtensionFunction();
+};
+
+#endif  // CHROME_BROWSER_EXTENSIONS_CHROME_EXTENSION_FUNCTION_H_