Try again to land: http://codereview.chromium.org/160483

chrome/browser/extensions/extension_install_ui.h

Index: chrome/browser/extensions/extension_install_ui.h
diff --git a/chrome/browser/extensions/extension_install_ui.h b/chrome/browser/extensions/extension_install_ui.h
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+// Copyright (c) 2009 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_INSTALL_UI_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_INSTALL_UI_H_
+
+#include "base/file_path.h"
+#include "base/gfx/native_widget_types.h"
+#include "base/ref_counted.h"
+#include "chrome/browser/extensions/crx_installer.h"
+
+class ExtensionsService;
+class MessageLoop;
+class Profile;
+class SandboxedExtensionUnpacker;
+
+// Displays all the UI around extension installation.
+//
+// TODO(aa): This will become a view and move to browser/views/extensions in the
+// future.
+class ExtensionInstallUI : public CrxInstallerClient {
+ public:
+  ExtensionInstallUI(Profile* profile);
+
+ private:
+  // CrxInstallerClient
+  virtual bool ConfirmInstall(Extension* extension);
+  virtual void OnInstallSuccess(Extension* extension);
+  virtual void OnInstallFailure(const std::string& error);
+  virtual void OnOverinstallAttempted(Extension* extension);
+
+  void ShowThemeInfoBar(Extension* extension);
+
+  Profile* profile_;
+  MessageLoop* ui_loop_;
+};
+
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_INSTALL_UI_H_