Remove JS dialog dependency from content.

content/browser/javascript_dialog_delegate.h

+// Copyright (c) 2011 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 CONTENT_BROWSER_JAVASCRIPT_DIALOG_DELEGATE_H_
+#define CONTENT_BROWSER_JAVASCRIPT_DIALOG_DELEGATE_H_
+#pragma once
+
+#include "ui/gfx/native_widget_types.h"
+
+class ExtensionHost;
+class TabContents;
+
+namespace IPC {
+class Message;
+}
+
+namespace content {
+
+class JavaScriptDialogDelegate {
+ public:
+  // This callback is invoked when the dialog is closed.
+  virtual void OnDialogClosed(IPC::Message* reply_msg,
+                              bool success,
+                              const string16& user_input) = 0;
+
+  // Returns the root native window with which to associate the dialog.
+  virtual gfx::NativeWindow GetDialogRootWindow() = 0;
+
+  // Returns the TabContents implementing this delegate, or NULL if there is
+  // none. TODO(avi): This breaks encapsulation and in general sucks; figure out
+  // a better way of doing this.
+  virtual TabContents* AsTabContents() = 0;
+
+  // Returns the ExtensionHost implementing this delegate, or NULL if there is
+  // none. TODO(avi): This is even suckier than AsTabContents above as it breaks
+  // layering; figure out a better way of doing this. http://crbug.com/84604
+  virtual ExtensionHost* AsExtensionHost() = 0;
+
+ protected:
+  virtual ~JavaScriptDialogDelegate() {}
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_JAVASCRIPT_DIALOG_DELEGATE_H_