Add a first-class off-store install UI to chrome://extensions/.

chrome/browser/ui/webui/extensions/install_extension_handler.h

Index: chrome/browser/ui/webui/extensions/install_extension_handler.h
diff --git a/chrome/browser/ui/webui/extensions/install_extension_handler.h b/chrome/browser/ui/webui/extensions/install_extension_handler.h
new file mode 100644
index 0000000000000000000000000000000000000000..64a0f6230c14def4428ad3840c92a1a55237e9ba
--- /dev/null
+++ b/chrome/browser/ui/webui/extensions/install_extension_handler.h
@@ -0,0 +1,33 @@
+// 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_UI_WEBUI_EXTENSIONS_INSTALL_EXTENSION_HANDLER_H_
+#define CHROME_BROWSER_UI_WEBUI_EXTENSIONS_INSTALL_EXTENSION_HANDLER_H_
+#pragma once
+
+#include "base/file_path.h"
+#include "base/values.h"
+#include "content/public/browser/web_ui_message_handler.h"
+
+class InstallExtensionHandler : public content::WebUIMessageHandler {

[James Hawkins, 2012/05/01 23:13:36]

nit: Document class.

[Aaron Boodman, 2012/05/02 00:41:36]

Done.

+ public:
+  InstallExtensionHandler();
+  virtual ~InstallExtensionHandler();
+
+  void GetLocalizedValues(DictionaryValue* localized_strings);
+
+  // WebUIMessageHandler implementation.
+  virtual void RegisterMessages() OVERRIDE;
+
+ private:
+  void HandleStartDragMessage(const ListValue* args);
+  void HandleStopDragMessage(const ListValue* args);
+  void HandleInstallMessage(const ListValue* args);
+
+  FilePath file_to_install_;

[James Hawkins, 2012/05/01 23:13:36]

nit: Document member var.  The var name alone is not enough.

[Aaron Boodman, 2012/05/02 00:41:36]

Done.

+
+  DISALLOW_COPY_AND_ASSIGN(InstallExtensionHandler);
+};
+
+#endif  // CHROME_BROWSER_UI_WEBUI_EXTENSIONS_INSTALL_EXTENSION_HANDLER_H_